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      Gem Price Guide

      Summary
      The IGS Gem Price Guide covers commonly traded colored gemstones as well as more unusual, collectible gems. The values listed below are based on a variety of sources, including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers.
      Reading time: 4 min
      kunzite - gem price guide

      Kunzite is the pink variety of the mineral spodumene. Finding a faceted kunzite, like this large, 720-ct gem from Brazil, is unusual, since this material is extremely difficult to cut and wear as a jewelry stone. Photo ? Joel E. Arem, PhD, FGA. Used with permission.

      How to Use the IGS Gem Price Guide

      A faceted gem’s price is based on an evaluation of its physical and optical properties. These are often referred to as the “Four Cs” — color, clarity, cut, and carat. (Here’s a handy introduction to how gemologists grade those properties).

      However, despite well-established grading systems for color, clarity, and cut, any evaluation of these properties is inherently subjective. Even gemologists and appraisers may disagree about the quality of a specific stone, so disagreements regarding gem prices do occur.

      Ultimately, the price of a gem is what one willing buyer and one willing seller can actually agree upon. Our gem price guide is just that — a guide. Keep in mind that gems are sold outside these price ranges every day. See our article on pricing faceted gems for more information.

      Prices listed are retail in US dollars. Wholesale is generally?one third of retail. High-end gems are often marked up 30% or less, while low-priced, more “commercial quality” faceted gems are often marked up considerably more.

      Unless otherwise noted, all prices listed below are for cut gems, not rough or raw crystal forms, and all?weights are in carats.

      Click here for more information on gem prices and grading.
      emerald - gem price guide

      Many factors can influence the price of emerald gems, including their origins. For a more in-depth explanation of these factors, consult our emerald buying guide. 2.02-ct emerald, Zambia. Photo courtesy of liveauctioneers.com and Jasper52.

      Appraisals

      If you’re not familiar with gem grading or pricing, consider getting an appraisal before buying or selling a gemstone. However, bear in mind that there are no regulations governing who can appraise gems, so carefully review the credentials of prospective appraisers. Choose an appraiser from a well-respected gemological organization or a reputable gem trader with experience dealing in the specific gem you’re interested in.

      Gemstone Properties

      Color

      Many of the gems listed below have color descriptions. Some just have simple color names — red, purple, etc. Others also have codes with abbreviations and numbers, such as “slpR 5/5.” See Spinel, for example. Those codes are gem color grades from the Gemological Institute of America (GIA) color grading system. For a brief explanation of the codes, read this article. Consult our article on gemstone color grading for more information.

      amethyst - color grades - gem price guide

      This 10.35-ct amethyst has a GIA color grade of vP 5/5. That means a violetish purple hue, a medium tone, and a strong saturation. ? RSA Gems. Used with permission.

      Clarity

      Some of the gems listed below have clarity descriptions such as “clean” or “eye clean.” Other gems have coded clarity grades, such as “VVS” and “SI/I.” See Emerald and Sapphire, for example. For a brief explanation of the GIA clarity codes, read this article. For more detailed information, consult our article on clarity types and grades for colored gemstones.

      eye-clean aquamarine - gem price guide

      This 6.48-ct aquamarine has an “eye clean” clarity. This means it has no evident clarity flaws visible to the unaided eye. (As a “Type I” gem in the GIA clarity grading system, aquamarines are usually eye clean). ? The Gem Trader. Used with permission.

      Cut

      Colored gemstone cutting can be difficult to evaluate, but its effects will be apparent to your eyes and your wallet. Consult our article on evaluating the cut for more information.

      Some of the gem values listed below distinguish between faceted and cabbed stones. Others?refer to specific types of faceted gem cuts, such as rounds, ovals, pears, etc. This overview of the lapidary arts will introduce you to the basic types of gem cutting — faceting, cabbing, tumbling, and carving. To learn more about specific faceted cuts, see our articles on fancy gem cuts and cutting styles.

      Portuguese-cut Oregon sunstone - gem price guide

      This 2.52-ct Oregon sunstone has a classic, round Portuguese cut. ? Dan Stair Custom Gemstones. Used with permission.

      Carat

      One carat equals 0.20 grams. Unlike the other Cs, carats can be objectively measured and confirmed.

      Note that some gems have increases in prices per carat at specific weights. Some gems actually see a decrease in price per carat as they get larger. To learn about gem weight and value, check out our article on carats and gem grading.

      The IGS Gem Price Guide

      You can click on the links below to go directly to the listing for a specific gem.

      Actinolite Value

      Accompanying value information:
      Cut Weight Price
      Cat’s Eye 1 carat /ct
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      Agate Value

      Cabochons All Sizes
      Agate $.50 to /ct
      Fire Agate to /ct
      Blue Chalcedony to /ct
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      Alexandrite Value

      Top Color: G 5/2 and R or slpR 5/3
      Faceted to .5 carat .5 to 1 carat 1 carat plus
      Top Red/Green to /ct to /ct to ,000/ct
      Medium Red/Green to to /ct to ,000/ct
      Slight Red/Green to /ct to /ct
       
      Cabochons .3 to 1.5 carat 1.5 carats plus
      Strong red/green to /ct to ,000/ct
       
      Cat’s Eye All sizes
      Strong red/green to /ct
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      Allanite Value

      All sizes
      Faceted to /ct
      Cabochons to /ct
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      Amber Value

      Cabochons All sizes
      With insect inclusions - per gram
      Plain cabochons - per gram
      Prices may be higher for pieces with inclusions of rare insects.
      Faceted All sizes
      Beads or drops - per gram
      Amber is rarely faceted. Please Note:?Amber is commonly sold by grams, not carats. 1 gram = 5 carats.
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      Amethyst Value

      Top Color: P, bP 7/5
      Faceted .5 to 1 carat 1 carat plus
      Siberian to /ct to /ct
      Medium to /ct to /ct
      Light to /ct to /ct
       
      Cabochons 1 carat plus
      Dark to /ct
      Medium to /ct
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      Ammolite Value

      All sizes
      Naturals to /ct
      Doublets to /ct
      Triplets to /ct
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      Andalusite Value

      Accompanying value information:
      Top Color: YG 5/2 and O 5/4
      Faceted 1 to 4 carats 4 carats plus
      Top color to /ct to ,000/ct
      Medium color to /ct to /ct
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      Anglesite Value

      Accompanying value information:
      Faceted 10 carat plus
      to /ct
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      Apatite Value

      Accompanying value information:
      Faceted .3 to 1 carat 1 to 3 carats 3 carats plus
      “Neon Blue” to /ct to /ct to /ct
      Brazil Blue to /ct to /ct to /ct
      Blue Cat’s Eye 3 carats plus
      to /ct
      OTHER COLORS
      Faceted All sizes
      to /ct
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      Apophyllite Value

      Accompanying value information:
      Faceted 3 to 10 carats
      to /ct
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      Aquamarine Value

      Top Color: GB 4/4
      Faceted .5 to 1.5 carats 1.5 to 3 carats 3 carat plus
      Dark to /ct to /ct to /ct
      Medium to /ct to /ct to /ct
      Light to /ct to to /ct
      Cabochons All Sizes
      Plain to /ct
      Cat’s Eye to /ct
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      Aragonite Value

      Accompanying value information:
      Faceted 5 carats plus
      to /ct
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      Axinite Value

      Accompanying value information:
      Faceted 1 to 5 carats
      to /ct
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      Azurite Value

      Accompanying value information:
      Cabochons All sizes
      to /ct
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      Barite Value

      Accompanying value information:
      Faceted 1 carat plus
      Yellow to /ct
      Colorless to /ct
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      Benitoite Value

      Accompanying value information:
      Faceted .1 to .5 carats .5 to 1 carat 1 carat plus
      to /ct to /ct to ,000/ct
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      Beryl Value

      Accompanying value information:
      Red .1 to 1 carat 1 carat plus
      to ,000/ct to ,000/ct
      Fine Color Morganite: slpR 3/4
      Morganite 1 to 10 carats 10 carat plus
      to /ct to /ct
      Fine Color Yellow: Y 4/4
      Gold & Yellow 1 to 10 carats 10 carat plus
      to /ct to /ct
      Fine Color Green: slyG 4/3
      Green 1 to 20 carats 20 carats plus
      to /ct to /ct
      Goshenite All sizes
      to /ct
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      Brazilianite Value

      Accompanying value information:
      Faceted 1 carat plus
      to /ct
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      Bytownite Value

      Accompanying value information:
      Faceted 1 to 3 carats
      TO /ct
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      Calcareous Concretions / Non-Nacreous Pearls Value

      Conch Pearls
      Accompanying value information:
      All sizes
      to ,000/ct
      Tridacna Pearls
      Accompanying value information:
      All Sizes
      - / ct
      Melo Pearls
      Accompanying value information:
      All Sizes
      - / ct
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      Calcite Value

      Accompanying value information:
      Faceted 5 to 100 carats
      to /ct
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      Celestite Value

      Accompanying value information:
      Faceted All sizes
      to /ct
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      Cerussite Value

      Accompanying value information:
      Faceted 5 carats plus
      to /ct
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      Chambersite Value

      Accompanying value information:
      Faceted .10 carats plus
      to /ct
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      Chrysoberyl Value

      Top Color: styG, YG, gY 3/4
      Faceted 1 to 7 carats
      Color Change to ,000/ct
      Fine Green to /ct.
      Bright Yellow to /ct
      Brownish Yellow to /ct
      Cat’s Eye All sizes
      /ct to /ct
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      Chrysocolla Value

      Accompanying value information:
      Sillicated All sizes
      Solid Color to /ct
      Parrot Wing /ct
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      Chrysoprase Value

      Cabochons All sizes
      to /ct
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      Cinnabar Value

      Accompanying value information:
      Cabochons All sizes
      to /ct
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      Citrine Value

      Top Color:?O 6/4
      Faceted .5 to 1 carat 1 carat plus
      Madeira to /ct
      Orange to /ct to /ct
      Yellow to to /ct
      Gold to to /ct
      Cabochons .5 to 1 carat 1 carat plus
      Yellow to Orange to /ct to /ct
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      Colored Diamonds Value

      Black Diamonds .6 - .10 carats .10 - .24 carats .25 to .33 carats .35 to .50 carats .51 to .74 carats 1 carat +
      – 120/ct - /ct - /ct - /ct - /ct - /ct
      Note: these prices are for natural black diamonds. Most black diamonds on the market are treated to color. Their value is in the tens of dollars per carat.
      Brown Diamonds .33 to .9 carats 1 to 1.5 carats
      VS2 /ct to /ct
      SI2 /ct to /ct
      I1 to /ct to /ct
      Natural Fancy Colors .1 to .99 carats 1 carat plus
      Yellow/Brown to /ct
      Yellow SI to I1 to /ct
      Yellow SI1 to VVS2 to ,000/ct to /ct
      Orange SI1 to I1 to /ct
      Irridated Fancy Colors .1 to .99 carats 1 carat plus
      Yellow SI1 to I1 to /ct to /ct
      Green SI1 to /ct to /ct
      Blue SI1 to /ct to /ct
      Pink SI1 to /ct to /ct
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      Coral Value

      Cabochons All sizes
      Red to /ct
      Deep Pink to /ct
      Light Pink to /ct
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      Crocoite Value

      Accompanying value information:
      Faceted 5 to 10 carats
      to /ct
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      Cuprite Value

      Accompanying value information:
      Faceted 4 carats plus
      to /ct
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      Danburite Value

      Accompanying value information:
      Faceted 1 carat plus
      Pink to /ct
      Colorless to /ct
      Other Colors to /ct
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      Datolite Value

      Accompanying value information:
      Faceted .5 to 1 carat 1 carat plus
      /ct to /ct
      Start an IGS Membership today for full access to our price guide (updated monthly).

      Diaspore Value

      Faceted 1 to 12 carats
      to /ct
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      Diopside Value

      Accompanying value information:
      Chrome Diopside 1 to 2 carats 2 carats plus
      Faceted to /ct to /ct
      Black Star All sizes
      to /ct
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      Emerald Value

      Top origins: Colombian emeralds command premium prices. Recent finds in Ethiopia may also command premium prices. Prices assume colorless clarity enhancement, (no dyes.) Average brilliancy of 40 to 60%. Add up to 20% or deduct to 10% for other cutting. Prices for emerald cuts, round, ovals and pear. Add to 10% for marquis.

      Colombian Emeralds

      Top Color:?vstbG 5/5; bG 5/5 or 6/5; vslbG 5/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00-7.99 - - -
      8.00+ - - -
      Very Good Color: vstbG 6/5; bG 5/5, 4/5 or 6/4; vslbG 5/5, 6/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00-7.99 - - -
      8.00+ - - -
      Good Color: vstbG 4/5, 5/4, 6/4; bG 3/5, 4/4, 5/3, 6/3, 7/4; vslbG 3/5, 4/4, 4/5, 5/3, 6/4; G 4/5, 5/4,5/5, 6/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00-7.99 - - -
      8.00+ - - -
      Fair Color: vstbG 3/5, 4/4, 7/4; bG 3/4, 4/3, 7/3; vslbG 3/4, 6/3, 7/3, 7/4; G 3/5, 4/4, 5/3, 6/4
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00-7.99 - - -
      8.00+ - - -

      Other Emeralds

      Top Color: vstbG 5/5; bG 5/5 or 6/5; vslbG 5/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00+ - - -
      Very Good Color: vstbG 6/5; bG 5/5, 4/5 or 6/4; vslbG 5/5, 6/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00+ - - -
      Good Color: vstbG 4/5, 5/4, 6/4; bG 3/5, 4/4, 5/3, 6/3, 7/4; vslbG 3/5, 4/4, 4/5, 5/3, 6/4; G 4/5, 5/4,5/5, 6/5
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00+ - - -
      Fair Color: vstbG 3/5, 4/4, 7/4; bG 3/4, 4/3, 7/3; vslbG 3/4, 6/3, 7/3, 7/4; G 3/5, 4/4, 5/3, 6/4
      cts VVS VS/SI SI/I
      <0.25 - - -
      0.25-0.99 - - -
      1.00-1.99 - - -
      2.00-4.99 - - -
      5.00+ - - -
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      Enstatite Value

      Accompanying value information:
      Faceted All sizes
      to /ct
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      Epidote Value

      Accompanying value information:
      Faceted All sizes
      to /ct
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      Fluorite Value

      Accompanying value information:
      Faceted All sizes
      $.50 to /ct
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      Garnet Value

      Almandine

      Top Color: oR, R, PR, rP 6/4
      Almandine All sizes
      to /ct

      Almandine/Pyrope Blend ("Mozambique")

      Red-Brown Colors
      "Mozambique" All sizes
      to /ct

      Rhodolite (Almandine/Pyrope Blend)

      Fine Color: rP, PR 6/5
      Rhodolite .5 to 1 carat 1 to 10 carats 10 carats plus
      Faceted to /ct to /ct to /ct
      Cabochons to /ct to /ct to /ct

      Andradite

      Fine Color: G 5/4
      Andradite All sizes
      to /ct

      Demantoid

      Demantoid to 1 carat 1 to 3 carats
      to /ct to ,000/ct

      Grossular

      Grossular .5 to 1 carat 1 to 5 carats 5 carats plus
      Mint Green (Merelani) to /ct to /ct to /ct
      Yellow/Orange to /ct to /ct to /ct
      Yellow/Green to /ct to /ct to /ct
      Other colors /ct /ct to /ct

      Hessonite

      Fine Color: yO 4/5
      Hessonite Garnet All sizes
      to /ct

      Tsavorite

      Fine Color: G 6/5
      Tsavorite .5 to 1 carat 1 to 2 carats 2 carats plus
      Faceted to /ct to /ct to ,000/ct

      Mali Garnets (Andradite/Grossular Blend)

      Mali Garnet All sizes
      to /ct

      Malaya (Malaia) Garnets

      Malaya Garnet .5 to 1 carat 1 to 5 carats 5 carats plus
      to /ct to /ct to /ct

      Pyrope

      Fine Color: R 6/5
      Pyrope 1 carat plus
      /ct

      Chrome Pyrope

      Chrome Pyrope All sizes
      to /ct

      Spessartite

      Spessartite Reds .5 to 3 carats 3 to 6 carats
      Little 3 Mine to /ct to /ct
      African to /ct to /ct
      Darker reds to /ct

      Mandarin

      Fine Color: O 4/5
      Mandarin Orange All sizes
      to /ct

      Uvarovite

      Uvarovite 10 carats plus
      Druzy to /ct

      Star Garnet

      Star Garnet All sizes
      6 ray star to /ct
      4 ray star to /ct

      Color Change

      Color Change .5 to 1 carat 1 to 6 carats
      Africa to /ct to /ct
      US to /ct to /ct

      Cabochons

      Cabochons All Sizes
      Common red to purple to /ct
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      Gold In Quartz Value

      Accompanying value information:
      Cabochons All sizes
      to /ct.
      Start an IGS Membership today for full access to our price guide (updated monthly).

      Iolite Value

      Top Color: slvB 5/4
      Faceted Under 1 carat 1 to 3 carats 3 carats plus
      to /ct to /ct to /ct
      Colorless All sizes
      to /ct
      Cabochons Under 1 carat 1 carat plus
      to /ct to /ct
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      Kunzite Value

      Faceted 1 to 10 carats 10 carats plus
      to /ct to /ct
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      Lapis Lazuli Value

      Cabochons All sizes
      to /ct
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      Malachite Value

      Accompanying value information:
      Cabochons All sizes
      to /ct
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      Moissanite Value

      Faceted .5 to 1 carat over 1 carat
      Colorless to /ct to /ct
      Green to /ct to /ct
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      Moldavite Value

      Accompanying value information:
      Faceted All sizes
      to /ct
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      Moonstone Value

      Rainbow Moonstone (Peristerite) .5 to .99 carats 1 to 7 carats
      Cabochons to /ct to /ct
      Labradorite 10 to 30 carats
      Cabochons to /ct
      White, including cat's eyes All sizes
      to /ct
      White – Adularescent All sizes
      to /ct
      Other Colors All sizes
      to /ct
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      Opal Value

      Black Opal, tone N1 to N4

      Carat Weight Below commercial Commercial Good Fine Extra fine
      1 to 5 - /ct - /ct - ,400/ct ,400 - ,000/ct ,000 - ,000/ct
      5 to 10/ct - /ct - /ct - ,400/ct ,400 - ,000/ct ,000 - ,000/ct
      10 + - /ct - /ct - ,400/ct ,400 - ,400/ct ,400 - ,000/ct

      Dark Opal, tone N5 to N6

      Carat Weight Below commercial Commercial Good Fine Extra fine
      1 to 5 - /ct - /ct - ,200/ct ,200 - ,000/ct ,000 - ,000/ct
      5 to 10/ct - /ct - /ct - ,200/ct ,200 - ,000/ct ,000 - ,000/ct
      10 + - /ct - /ct - ,200/ct ,200 - ,600/ct ,600 - ,400/ct

      Light Opal, tone N7 to N9

      Body Tone Below commercial Commercial Good Fine Extra fine
      N7 - /ct - /ct - /ct - ,000/ct ,000 - ,400/ct
      N8 - /ct - /ct - /ct - /ct - ,200/ct
      N9 - /ct - - /ct - /ct - /ct

      Crystal Opal

      Carat Weight Below commercial Commercial Good Fine Extra fine
      1 to 5 - /ct - /ct - /ct - ,000/ct ,000 - ,000/ct
      5 to 10/ct - /ct - /ct - /ct - ,000/ct ,000 - ,400/ct
      10 + - /ct - /ct - /ct - ,000/ct ,000 - ,000/ct

      Boulder and Matrix Opal

      Carat Weight Below commercial Commercial Good Fine Extra fine
      1 to 5 - /ct - /ct - /ct - /ct - /ct
      5 to 10/ct - /ct - /ct - /ct - /ct - /ct
      10 to 15 - /ct - ,20/ct - /ct - /ct - /ct
      15 + - /ct - /ct - /ct - /ct - /ct

      Composite Opals

      Doublets prices are usually 15% to 35% of the value of similar looking natural, (solid,) gem. However, they occasionally run as high as 50% of a natural opal if they are of exceptional quality. Triplets are only about 1% of the value of an equivalent natural and peak at .

      Other Opal Types

      Contra Luz All sizes
      to /ct
      Fire Opals, faceted .4 to 1 carat 1 to 5 carats 5 carats plus
      to /ct to /ct to /ct
      Fire Opals, Cabochons .4 to 2 carats 2 to 10 carats
      Solid to /ct to /ct
      In Matrix to /ct
      Pink Opal All sizes
      /ct
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      Oregon Sunstone Value

      Schiller

      • Color Intensity: Light, medium, deep
      • Color Range: Clear, gold, peach, coral, orange, red, green
      • Transparency: Translucent to Opaque
      The price range is consistently between - per carat regardless of size or color.

      Clear Hues

      • Color Intensity: Light
      • Color Range: Clear, gold, peach, coral, pink, red, green, blue
      • Transparency: Transparent
      Price Per Carat Clear Peach Pink Light Blue Green
      Up to 2.5 cts
      2.5-5 cts
      5-7 cts
      7 cts

      Mid-Deep Tones

      • Color Intensity: Medium to deep
      • Color Range: Strong Peach, orange, red, green, blue
      • Transparency: Transparent
      Price Per Carat Med Red Orange Red Blue Green
      Up to 2.5 cts
      2.5-5 cts
      5-7 cts
      7 cts

      Constellation, AKA Aventurescent

      • Color Intensity: Medium to deep
      • Color Range: Strong peach, orange, red, green, blue
      • Transparency: Transparent
      Price Per Carat Mid to Deep Color Constellation
      Up to 2.5 cts
      2.5-5 cts
      5-7 cts
      7 cts

      Two Tone (Dichroic)

      • Color Intensity: Medium to deep
      • Color Range: Strong peach, orange, red, green, blue
      • Transparency: Transparent
      Price Per Carat Light Dichroic Med Dichroic Deep Dichroic
      Up to 2.5 cts
      2.5-5 cts
      5-7 cts
      7 cts

      Classic Sunstone

      • Color Intensity: Combination of light-medium or light-deep
      • Color Range: Gold, peach, coral, pink, red, green, blue
      • Transparency: Transparent
      Note: There was a limited sampling of larger sized stones, which may affect pricing accuracy.
      Price Per Carat Light Classic Pink/Peach Classic Mid to Deep Red Classic Blue/Green
      Up to 2.5 cts
      2.5-5 cts
      5-7 cts
      7 cts

      Mystique

      • Color Intensity: Light, medium, deep
      • Color Range: Gold, peach, coral, pink, red, green, blue
      • Transparency: Transparent
      Price Per Carat Med-Deep Mystique
      Up to 2.5 cts
      2.5-5 cts ,226.00
      5-7 cts
      7 cts
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      Pearls

      Prices of pearls are based on several quality factors. The values provided in this guide are for round cultured pearls. Baroque pearls are about 25-35% the cost of round pearls. Natural pearls are extremely rare, and largely limited to auction and collector’s markets. These can be worth 10 to 20 times an equivalent Akoya cultured pearl.

      Akoya Pearls with White Body Color

      Accompanying value information:

      Matching Pair

      Size (mm) Top Luster High Luster
      6 - 6.5 - -
      6.5 - 7 - -
      7 - 7.5 - -
      7.5 - 8 - -
      8 - 8.5 - -
      8.5 - 9 - -
      9 - 9.5 - -

      Single Pearl

      Size (mm) Top Luster High Luster
      6 - 6.5 - -
      6.5 - 7 - -
      7 - 7.50 - -
      7.5 - 8 - -
      8 - 8.5 - -
      8.5 - 9 - -
      9 - 9.5 - -

      Freshwater Pearls with White Body Color

      Matching Pair

      Size (mm) Top Luster High Luster
      6 - 7 - -
      7 - 8 - -
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -

      Single Pearl

      Size (mm) Top Luster High Luster
      6 - 7 - -
      7 - 8 - -
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -

      South Sea Pearls

      Accompanying value information:

      Matching Pair

      Size (mm) High Luster, White High Luster, Golden
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -
      11 - 12 - -
      12 - 13 - -
      13 - 14 - -

      Single Pearl

      Size (mm) High Luster, White High Luster, Golden
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -
      11 - 12 - -
      12 - 13 - -
      13 - 14 - -

      Tahitian Pearls with Black Body Color

      Accompanying value information:

      Matching Pair

      Size (mm) Top Luster High Luster
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -
      11 - 12 - -
      12 - 13 - -

      Single Pearl

      Size (mm) Top Luster High Luster
      8 - 9 - -
      9 - 10 - -
      10 - 11 - -
      11 - 12 - -
      12 - 13 - -
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      Peridot Value

      Top Color: yG 5/4
      Faceted .5 to 1 carat 1 to 3 carats 3 carats plus
      Eye Clean to /ct to /ct to /ct
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      Phenakite Value

      Accompanying value information:
      Faceted All sizes
      to /ct
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      Quartz Value

      Smoky Quartz All sizes
      Faceted to /ct
      Rose Quartz All sizes
      Faceted to /ct
      Rutilated & Tourmalinated Quartz All sizes
      Faceted to /ct
      Cabochons /ct
      Quartz with Lepidocrite All sizes
      Faceted or cabochon to /ct
      Star Quartz All sizes
      to /ct
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      Rhodochrosite Value

      Accompanying value information:
      Faceted All sizes
      Colorado to /ct
      African to /ct
      Cabochons All sizes
      Bulls eye to /ct
      Plain to /ct
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      Ruby Value

      Burma Ruby - Unheated

      Origin and lack of treatment should be certified. Prices for oval and cushion cuts. Add up to 20% or deduct to 10% for other cutting. Add 7% to 10% for rounds, pears, marquis. Add 15% to30% for emerald cuts.
      Top Color: R 6/6
      No trade data available. As of May 2015, the record price for a ruby is approximately 2 million per carat. ( million for a 25.59 carat Mogok "pigeon's blood" ruby).
      Very Good Color: R 5/6, 7/5; slpR 5/6, 6/6, 7/5; stpR 6/6
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct
      Good Color: R 6/5; slpR 6/5; stpR 5/6
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct
      Fair Color: R 5/5, 6/4, 7/4; slpR 5/5, 6/4, 7/4
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct

      Ruby - Heat Treated

      Prices for oval and cushion cuts. Add up to 20% or deduct to 10% for other cutting. Add 7% to 10% for rounds, pears, marquis. Add 15% to30% for emerald cuts.
      Top Color: R 6/6
      No trade data available.
      Very Good Color: R 5/6, 7/5; slpR 5/6, 6/6, 7/5; stpR 6/6
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct
      Good Color: R 6/5; slpR 6/5; stpR 5/6
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct
      Fair Color: R 5/5, 6/4, 7/4; slpR 5/5, 6/4, 7/4
      cts VVS VS/SI SI/I
      0.50-0.99 - /ct - /ct - /ct
      1.00-1.99 - /ct - /ct - /ct
      2.00-2.99 - /ct - /ct - /ct
      3.00-4.99 - /ct - /ct - /ct
      5.00+ - /ct - /ct - /ct

      Additional Ruby Shapes and Types

      Cabochons .5 to 1 carat over 3 carats
      to /ct to /ct
      Star Ruby .5 to 1 carat Over 1 carat
      Near top color to /ct to /ct
      Indian Rubies All sizes
      to .ct
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      Sapphire Value

      Kashmir Sapphire

      Certified origin. Untreated material. Average brilliancy of 40 to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis.
      Top Grade: vB 5/6, 6/6. B 5/6, 6/6.
      Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
      VVS ,000 to ,650/ct ,000 to ,000/ct ,000 to ,500/ct to ,000/ct
      VS/SI ,000 to ,000/ct ,000 to ,700/ct ,000 to ,000/ct to ,000/ct
      SI/I ,000 to ,000/ct ,000 to 24,600/ct ,000 to 27,600/ct to ,000/ct
      Very Good Grade: V 4/6, 5/6, 6/5. bV 5/6, 6/6; vB 5/5, 4/6, 6/5.
      Very Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
      VVS ,000 to ,300/ct ,600 to ,400/ct ,000 to ,000/ct to ,000/ct
      VS/SI to ,100/ct ,000 to ,700/ct ,000 to ,000/ct to ,500/ct
      SI/I to ,300/ct ,000 to ,000/ct ,400 to ,600/ct to ,500/ct
      Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 5/4, 4/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 5/4, 4/5.
      Good Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
      VVS to ,200/ct to ,700/ct ,000 to ,000/ct to ,000/ct
      VS/SI to /ct to ,200/ct ,000 to ,000/ct to ,000/ct
      SI/I to /ct to ,500/ct ,000 to ,000/ct to ,900/ct
      Fair Grade: V 3/4, 3/5, 4/4, 4/3, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 7/4, 6/2, 5/3; B 3/4, 4/3, 7/4 6/2, 5/2, 5/3.
      Fair Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
      VVS to /ct to ,200/ct to ,500/ct to ,500/ct
      VS/SI to /ct to /ct to ,000/ct to ,000/ct
      SI/I to /ct to /ct to ,500/ct to ,700/ct

      Other Blue Sapphires

      Heat treated material. Average brilliancy of 40% to 60%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 8% to 10% for rounds and pears. Add 10% to 20% for emeralds and marquis. Note: If certified Burmese and untreated, add 50%, except fair or lower grades. Typically, mid-quality untreated blue sapphire will sell for 20-30% more than a treated stone of the same quality. Top-quality unheated stones could get a premium of 50% or higher, especially if they're large.
      Top Grade: vB 5/6, 6/6; B 5/6, 6/6.
      Top Grade 1 to 2 carats 2 to 3 carats 3 to 4 carats 4 carats plus
      VVS to /ct to /ct to /ct to ,500/ct
      VS/SI to /ct to /ct to /ct /ct
      SI/I to /ct to /ct to /ct /ct
      Very Good Grade: V 4/6, 5/5, 6/6; bV 5/6, 6/7; vB 5/5, 4/6, 6/5; B 4/6, 5/5, 6/5; vslgB 4/6, 5/6, 6/6.
      Very Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct to /ct
      VS/SI to /ct to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct to /ct
      Good Grade: V 4/5, 5/4, 5/5, 6/4, 6/5, 7/5; bV 4/5, 4/6, 5/4, 5/5, 6/4, 6/5; vB 3/5, 4/4, 6/3, 7/5, 5/4, 4/5; B 3/5, 4/4, 6/3, 7/5, 6/4, 6/4, 5/4, 4/5; vslgB 7/5, 5/4, 6/4, 4/5, 6/5, 5/5; gB 4/5, 5/5, 6/5.
      Good Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct to /ct
      VS/SI to /ct to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct to /ct
      Fair Grade: V 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; bV 3/5, 4/4, 5/3, 6/3, 7/4, 7/5; vB 3/4, 4/3, 6/2, 7/4, 5/3; B 3/4, 4/3, 7/4, 6/2, 5/2, 5/3; vslgB 3/4, 3/5, 4/3, 4/4, 5/3, 6/3, 7/4; gB 3/5, 4/4, 5/3, 5/4, 6/3, 6/4, 7/4; vstgB 4/4, 5/4, 6/4.
      Fair Grade .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct to /ct
      VS/SI to /ct to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct to /ct

      Fancy Sapphires

      Average brilliancy of 30% to 40%. Add to 20% or deduct to 10% for other cutting. Prices for ovals and cushions. Add 7% to 10% for rounds, pears and marquis. Add 15% to 30% for emerald cuts.

      Pink Sapphire

      Top Color: stpR 3/6, 4/6; RP 4/6; rP 4/6
      No trade data available
      Very Good Color: slpR 4/6; stpR 4/5; RP 3/5, 4/4, 4/5; rP 3/5, 4/4, 4/5; P 4/5.
      Very Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct to ,500/ct
      VS/SI to /ct to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct to /ct
      Good Color: slpR 3/5, 4/4, 4/5; stpR 3/4, 3/5, 4/4; RP 3/4, 4/3; rP 3/4, 4/3; P 3/4, 4/4.
      Good Color .5 to .75 carat .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct to /ct
      VS/SI to /ct to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct to /ct
      Fair Color: slpR 3/3, 4/3; stpR 3/4, 4/3; RP 2/3, 3/3; rP 2/3, 3/3; P 3/, 4/3.
      Fair Color .75 to 1 carat 1 to 2 carats 2 carats plus
      VVS to /ct to /ct to /ct
      VS/SI to /ct to /ct to /ct
      SI/I to /ct to /ct to /ct

      Yellow Sapphire

      Top Color: Y 3/5; oY 3/5. Very Good Color: Y 3/4; oY 3/4. Good Color: Y 3/3, 4/4; oY 3/3, 4/4. Fair Color: Y 2/3, 4/3; oY 2/3, 4/3.
      Yellow Sapphire to 2 carats 2 carats plus
      Top Color to /ct to /ct
      Very Good Color to /ct to /ct
      Good Color to /ct to /ct
      Fair Color to /ct to /ct

      Green Sapphire

      Top Color: vslbG 6/3, bG 6/3, G 6/3. Very Good Color: BG 6/3, vstbG 6/2, 5/3, 6/2; bG 4/3, 5/3, 6/3; vslbG 4/3, 5/3, 6/2; G 5/3, 7/3; slyG 5/3, 6/3; yG 6/3. Good Color: BG 4/3, 5/3, 6/2; vstbG 4/3, 5/3, 7/3; bG 4/2, 5/2, 7/3, G 5/2,6/2; slyG 5/2, 6/2, 7/3; yG 5/3, 6/2, 7/3; styG 5/3, 6/3; styG 5/3, 6/3. Fair Color: BG 4/2, 5/2; vstbG 4/2, 7/2; bG 3/2, 7/2; vslbG 7/2; G 4/2, 7/2; slyG 4/2, 7/2; yG 5/2, 7/3; styG 5/2, 6/2.
      Green Sapphire to 1 carat 1 carat plus
      Top Color to /ct to /ct
      Very Good Color to /ct to /ct
      Good Color to /ct to /ct
      Fair Color to /ct to /ct

      Purple Sapphire

      Top Color: RP 6/6, 5/6; rP 6/6; P 6/6. Very Good Color: stpR 5/5, 6/5; RP 5/5, 6/5, 7/5; rP 5/6, 6/5; P 5/6, 6/5; bP 5/6, 6/5. Good Color: slpR 5/3, 6/3; stpR 5/4, 6/4, 7/4; RP 5/4, 6/3, 6/4, 7/4; rP 5/4, 5/5, 6/4, 7/5; P 5/4, 5/5, 6/4, 7/5; bP 4/5, 4/6, 5/5. Fair Color: .
      Purple Sapphire to 2 carats 2 carats plus
      Top Color to /ct to /ct
      Very Good Color to /ct to /ct
      Good Color to /ct to /ct
      Fair Color to /ct to /ct

      Other Sapphires

      White Sapphire .5 to 3 carats 3 to 5 carats 5 to 15 carats
      to /ct to /ct to /ct
      Color Change Sapphire .5 to 1 carat 1 to 7 carats
      to /ct to /ct
      Blue Cabochons .5 to 1 carat 1 to 7 carats
      to /ct to /ct
      Star Sapphire .5 to 1 carat 1 to 5 carats
      Blue to /ct to /ct
      Fancy Colors to /ct to /ct
      Black to /ct to /ct
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      Sapphirine Value

      Accompanying value information:
      Faceted .5 to 1 carat 1 to 5 carats
      to /ct to /ct
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      Scapolite Value

      Accompanying value information:
      Gold 1 to 3 carats 3 carats plus
      Faceted to /ct to /ct
      Purple .5 to 1 carat 1 carat plus
      Faceted to /ct to /ct
      Colorless 1 to 10 carats 10 carats plus
      Faceted to /ct to /ct
      Cat’s Eye 1 to 10 carats
      to /ct
      Star 1 carat plus
      to /ct
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      Sphalerite Value

      Faceted 1 carat plus
      to /ct
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      Spinel Value

      Fine Color Blue: B 5/5
      Blue .5 to 2 carats 2 to 4 carats 4 carats plus
      Faceted to /ct to /ct to /ct
      Fine Color Red: R, slpR 5/5
      Red .2 to 1 carat 1 to 5 carats
      Faceted to /ct to ,000/ct
      Pink .5 to 1 carats 1 to 3 carats 3 carats plus
      Faceted to /ct to ,000/ct to
      Fine Color Purple: P 5/5: P, rP, bP, V 5/4
      Purple .5 to 1 carats 1 to 3 carats 3 carats plus
      Faceted to /ct to ,800/ct to ,000/ct
      Fine Color Orange: O, rO 5/5
      Other Colors .5 to 1 carats 1 to 5 carats 5 carats plus
      Faceted to /ct to /ct to ,000/ct
      Star Spinel All sizes
      to /ct
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      Sugilite Value

      Accompanying value information:
      Faceted All sizes
      to /ct
      Cabochons All sizes
      to /ct
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      Sunstone Value

      Accompanying value information:
      Red, Green & Bicolored .10 to .99 carats 1 to 100 carats
      SI to clean to /ct to /ct
      Peach .5 to 20 carats
      SI to clean to /ct.
      Schiller 1 carat plus
      SI to clean to /ct
      Yellow 1 carat plus
      SI to clean to /ct
      Cabochons All sizes
      Red to /ct
      Schiller to /ct
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      Tanzanite Value

      Top Color: vB 6/5
      Faceted .5 to 1 carat 1 to 3 carats 5 carats plus
      SI to Clean to /ct to /ct to /ct
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      Titanite Value

      Faceted .5 to 1 carats 1 to 10 carats 10 to 20 carats
      to /ct to /ct to /ct
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      Topaz Value

      Top Color: oR, R 5/5
      Imperial .5 to 1 carat 1 to 3 carats 3 carats plus
      - /ct to /ct to /ct
      Pink .5 to 3 carat 3 carats plus
      to /ct to /ct
      Top Color: vslgB, gB 5/5
      Blues & Colorless .5 to 1 carat 1 carat plus
      London Blue to to /ct
      Swiss Blue to /ct to /ct
      Sky Blue to /ct to /ct
      Colorless to /ct to /ct
      Other Colors All sizes
      Faceted to /ct
      Cabochons All sizes
      Blue to /ct
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      Tourmaline Value

      Brazilian Cuprian (Paraíba) Tourmaline

      Carat Weight Low Average Good Great Superb
      0.20-0.99 -,000 / ct ,000-,000?/ ct ,850-,000?/ ct ,000-,000?/ ct ,000-,500?/ ct
      1.00-1.99 -,000 / ct ,000-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000-,000?/ ct
      2.00-2.99 -,000 / ct ,500-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000+?/ ct
      3.00-4.99 ,100-,500 / ct ,000-,000?/ ct ,000-,000?/ ct ,000-,000?/ ct ,000+?/ ct
      5.00+ ,000+?/ ct ,000+?/ ct ,000+?/ ct ,000+?/ ct ,000+?/ ct

      African Cuprian (Paraíba) Tourmaline

      Carat Weight Low Average Good Great Superb
      0.20-0.99 -,000?/ ct -,700?/ ct ,700-,500?/ ct ,000-,000?/ ct ,000-,500?/ ct
      1.00-2.99 -,450 / ct ,400-,500 / ct ,900-,000?/ ct ,500-,000?/ ct ,000-,000?/ ct
      3.00-4.99 -,800?/ ct ,550-,000?/ ct ,000-,500?/ ct ,000-,000?/ ct ,000-,000?/ ct
      5.00-9.99 -,500?/ ct ,000-,500?/ ct ,500-,000?/ ct ,000-,500?/ ct ,000-,000?/ ct
      10.00+ -,000?/ ct ,000-,500?/ ct ,500-,000?/ ct ,500-,500?/ ct ,000-,000?/ ct

      Fine Color Blue: B 5/4

      Indicolite .4 to 2 carats 2 to 10 plus carats
      Faceted to /ct to /ct
      Cabochons to /ct

      Fine Color Red: R, slpR 6/5

      Rubellite .5 to 1 carat 1 to 5 carats 5 carats plus
      Reds to /ct to /ct to /ct
      Pinks to /ct to /ct to /ct

      Fine Color Green: vstbG, BG, vslbG 5/4

      Chrome .5 to 1 carat 1 to 5 carats
      to /ct to /ct
      Other greens .5 to 2 carats 2 to 5 carats 5 carats plus
      to /ct to /ct to /ct

      Other Tourmaline Types

      Other Faceted Tourmaline .5 to 1 carat 1 to 5 carats 5 plus carats
      Fancy Colors: - Yellow - Orange (Top Color Orange: O 4/5) - Purple to /ct to /ct to /ct
      Watermelon to to /ct to /ct
      Other Multicolor to to /ct to /ct
      Cat’s Eye .5 to 1 carat 1 to 5 carats 5 plus carats
      to /ct to /ct to /ct
      Other Cabochons 1 to 5 carats 5 plus carats
      All colors to /ct to /ct
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      Turquoise Value

      Cabochons All Sizes
      to /ct
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      Wulfenite Value

      Accompanying value information:
      Faceted .5 to 1.5 carat
      to /ct
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      Zircon Value

      Fine Color Red: oR 5/4
      Red 1 to 5 carats
      to /ct
      Fine Color Blue: vstgB 5/4
      Blue 1 to 5 carats 5 carats plus
      to /ct to /ct
      Fine Color Green: slyG 5/3
      Green 1 to 5 carats 5 carats plus
      to /ct to /ct
      Fine Color Yellow to Orange: rO 4/4
      Yellow to Orange .5 to 1 carat 1 to 20 carats
      Sold as "Gold" /ct to /ct
      Other Colors 1 carat plus
      to /ct
      Cat’s Eye All sizes
      Blue /ct
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      International Gem Society

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