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ID: 3781971 pcs
thumb image of 12ct Cushion-Cut Violet Blue Tanzanite (ID: 378197)
12.03 ct Tanzanite
13.1 x 12.8 mm
$ 6123.75
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ID: 3978771 pcs
thumb image of 12ct Baguette Cabochon Gold Brown Tiger's Eye (ID: 397877)
11.99 ct Tiger's Eye
14.1 x 12.8 mm
$ 15.47
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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: 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: 4079811 pcs
thumb image of 12.3ct Octagon / Scissor Cut Brown Smoky Quartz (ID: 407981)
12.28 ct Smoky Quartz
14.1 x 14 mm
$ 21.98
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ID: 3713631 pcs
thumb image of 12.1ct Oval Cabochon Multicolor Jasper (ID: 371363)
12.07 ct Jasper
16 x 12.2 mm
$ 12.07
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ID: 3829481 pcs
thumb image of 11.5ct Oval Cabochon Lavender Jadeite (ID: 382948)
11.54 ct Jadeite
19.8 x 13.1 mm
$ 80.78
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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: 3061151 pcs
thumb image of 13ct Oval Cabochon Pink Rose Quartz (ID: 306115)
12.96 ct Rose Quartz
17.5 x 13.9 mm
$ 15.55
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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: 4645551 pcs
thumb image of 12.1ct Fancy Cabochon Blue Turquoise (ID: 464555)
12.09 ct Turquoise
15.4 x 11.8 mm
$ 24.18
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ID: 3707501 pcs
thumb image of 12.3ct Oval Cabochon Multicolor Jasper (ID: 370750)
12.26 ct Jasper
19.7 x 14.5 mm
$ 12.26
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ID: 3285981 pcs
thumb image of 12.3ct Carved Rose with Half Drilled Hole Gold Brown Tiger's Eye (ID: 328598)
12.31 ct Tiger's Eye
15.1 x 13.5 mm
$ 14.77
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ID: 3708351 pcs
thumb image of 12.2ct Oval Cabochon Multicolor Jasper (ID: 370835)
12.24 ct Jasper
19.9 x 15.1 mm
$ 12.24
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ID: 4185491 pcs
thumb image of 12.8ct Oval Cabochon Cream Star Moonstone (ID: 418549)
12.80 ct Star Moonstone
16.3 x 13.9 mm
$ 51.20
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ID: 3846431 pcs
thumb image of 12.6ct Oval Cabochon Light Green Jadeite (ID: 384643)
12.63 ct Jadeite
20.4 x 15.5 mm
$ 63.15
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ID: 4168541 pcs
thumb image of 12.8ct Oval Cabochon Smoke Star Moonstone (ID: 416854)
12.76 ct Star Moonstone
15.9 x 9.9 mm
$ 51.04
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ID: 3434641 pcs
thumb image of 12.1ct Carved Rose with Hole Gold Brown Tiger's Eye (ID: 343464)
12.09 ct Tiger's Eye
16.3 x 16.2 mm
$ 14.51
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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: 3847931 pcs
thumb image of 13ct Marquise Slice Bi-Color Ruby in Fuchsite (ID: 384793)
12.97 ct Ruby in Fuchsite
29.8 x 15.2 mm
$ 88.59
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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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12 Carat Gems
Buy gems by price. 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