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ID: 4587991 pcs
thumb image of 12ct Oval Cabochon Light Blue Aquamarine (ID: 458799)
12.03 ct Aquamarine
18.6 x 14.8 mm
$ 96.24
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ID: 3460761 pcs
thumb image of 12.6ct Oval Cabochon Pink Rose Quartz (ID: 346076)
12.63 ct Rose Quartz
16.5 x 13.6 mm
$ 16.42
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ID: 4164631 pcs
thumb image of 12.3ct Oval Facet Golden Green Tourmaline (ID: 416463)
12.25 ct Tourmaline
15.7 x 12.8 mm
$ 2450.00
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ID: 4737761 pcs
thumb image of 12.5ct Round Cabochon White Cat's Eye Moonstone (ID: 473776)
12.50 ct Cat's Eye Moonstone
13.8 mm
$ 50.00
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ID: 4603311 pcs
thumb image of 11.7ct Oval Cabochon Green Chrysoprase (ID: 460331)
11.67 ct Chrysoprase
13.9 x 13.2 mm
$ 46.68
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ID: 3847981 pcs
thumb image of 12ct Marquise Slice Bi-Color Ruby in Fuchsite (ID: 384798)
12.02 ct Ruby in Fuchsite
28.6 x 15.5 mm
$ 82.10
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ID: 2715391 pcs
thumb image of 12.5ct Pear Cabochon Green Chrysoprase (ID: 271539)
12.50 ct Chrysoprase
16.2 x 13.6 mm
$ 56.25
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ID: 4503721 pcs
thumb image of 11.9ct Baguette / Scissor Cut Light Blue Aquamarine (ID: 450372)
11.89 ct Aquamarine
16.8 x 9.9 mm
$ 2972.50
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ID: 2716441 pcs
thumb image of 11.7ct Oval Cabochon Light Blue Aquamarine (ID: 271644)
11.69 ct Aquamarine
21.3 x 10.3 mm
$ 93.26
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ID: 3774681 pcs
thumb image of 12.4ct Shark Fin Cabochon Multicolor Ammolite (ID: 377468)
12.43 ct Ammolite
25 x 13.5 mm
$ 469.11
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ID: 4503711 pcs
thumb image of 11.9ct Octagon / Scissor Cut Light Blue Aquamarine (ID: 450371)
11.87 ct Aquamarine
17.4 x 10 mm
$ 2967.50
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ID: 3234421 pcs
thumb image of 11.8ct Carved Rose with Half Drilled Hole Gold Brown Tiger's Eye (ID: 323442)
11.81 ct Tiger's Eye
15.5 x 15.4 mm
$ 14.17
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ID: 4200091 pcs
thumb image of 12.1ct Oval Cabochon Green Jadeite (ID: 420009)
12.13 ct Jadeite
18.3 x 13.2 mm
$ 36.39
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ID: 3846561 pcs
thumb image of 12.2ct Octagon Facet Bi-Color Ametrine (ID: 384656)
12.22 ct Ametrine
15.1 x 12.5 mm
$ 97.76
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ID: 3853531 pcs
thumb image of 13ct Oval Cabochon Greenish Golden Cat's Eye Apatite (ID: 385353)
12.95 ct Cat's Eye Apatite
17.3 x 10.4 mm
$ 259.00
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ID: 4669401 pcs
thumb image of 12.8ct Drilled Sphere Blue Lapis Lazuli (ID: 466940)
12.82 ct Lapis Lazuli
11.9 mm
$ 12.82
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ID: 4669371 pcs
thumb image of 12.8ct Drilled Sphere Blue Lapis Lazuli (ID: 466937)
12.75 ct Lapis Lazuli
11.8 mm
$ 12.75
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ID: 4669391 pcs
thumb image of 12ct Drilled Sphere Blue Lapis Lazuli (ID: 466939)
12.01 ct Lapis Lazuli
12 mm
$ 12.01
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ID: 4183651 pcs
thumb image of 12.6ct Oval Cabochon Cream Star Moonstone (ID: 418365)
12.57 ct Star Moonstone
14.7 x 12.1 mm
$ 50.28
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ID: 4183621 pcs
thumb image of 12.5ct Oval Cabochon Cream Star Moonstone (ID: 418362)
12.51 ct Star Moonstone
15.3 x 13.3 mm
$ 50.04
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ID: 4079831 pcs
thumb image of 12.7ct Octagon / Scissor Cut Brown Smoky Quartz (ID: 407983)
12.70 ct Smoky Quartz
14.1 x 14.1 mm
$ 22.73
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12 Carat Gems
Buy gems by weight. Select the best 12 carat gems from a wide array of colored stones, including rare gem types such as scapolite, black opal and pietersite. Also available are beautiful and popular faceted gems, including tanzanite, zircon and tourmaline. Large 12-carat gems make perfect statement stones, whether they are worn as a necklace pendant, ring or another jewelry design. Browse the largest selection of natural loose colored gemstones available in 12 carats. From here, you can use our filters at the top or on the left-hand side to find gems by gem type, color, shape, cut and so on. For example, select 'jadeite' to see all of our 12-carat jadeite gems. Select 'green' to shop for 12-carat green gems. You can also filter by single, pairs, lots, faceted gems or cabochons by using the check boxes at the top.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart