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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: 4144191 pcs
thumb image of 11.6ct Oval Cabochon Light Blue Aquamarine (ID: 414419)
11.55 ct Aquamarine
16.6 x 12.6 mm
$ 92.40
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ID: 4184211 pcs
thumb image of 12.8ct Carved Fruit Green Prehnite (ID: 418421)
12.78 ct Prehnite
19.3 x 12.2 mm
$ 19.17
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ID: 4354601 pcs
thumb image of 12.4ct Pear Cabochon Colorless Golden Rutile Quartz (ID: 435460)
12.39 ct Rutile Quartz
19 x 13.9 mm
$ 30.73
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ID: 3781951 pcs
thumb image of 11.8ct Cushion-Cut Violet Blue Tanzanite (ID: 378195)
11.81 ct Tanzanite
15.4 x 10.5 mm
$ 6011.76
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ID: 3829431 pcs
thumb image of 12.5ct Oval Cabochon Pastel Green Jadeite (ID: 382943)
12.48 ct Jadeite
17.2 x 11.8 mm
$ 87.36
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ID: 3960351 pcs
thumb image of 11.6ct Asscher Cut White Quartz (ID: 396035)
11.59 ct Quartz
14.6 x 14.5 mm
$ 18.43
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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: 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: 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: 4009081 pcs
thumb image of 11.7ct Oval Facet Greenish Golden Apatite (ID: 400908)
11.65 ct Apatite
14.7 x 13 mm
$ 932.00
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ID: 3801071 pcs
thumb image of 12.5ct Cushion Cabochon Yellow Orange Fire Opal (ID: 380107)
12.52 ct Fire Opal
17.3 x 14.2 mm
$ 438.20
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ID: 3434651 pcs
thumb image of 11.8ct Carved Rose with Hole Gold Brown Tiger's Eye (ID: 343465)
11.77 ct Tiger's Eye
15.6 x 15.5 mm
$ 14.12
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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: 4333021 pcs
thumb image of 12.5ct Marquise Cabochon Multicolor Agate (ID: 433302)
12.51 ct Agate
30.4 x 11.6 mm
$ 10.01
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ID: 4473241 pcs
thumb image of 12.4ct Cushion Cabochon Multicolor Dendritic Chalcedony (ID: 447324)
12.42 ct Dendritic Chalcedony
18.3 x 13.1 mm
$ 18.63
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ID: 3708371 pcs
thumb image of 12.3ct Oval Cabochon Multicolor Jasper (ID: 370837)
12.30 ct Jasper
18.2 x 13.2 mm
$ 12.30
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ID: 3163951 pcs
thumb image of 11.7ct Oval Cabochon Pink Rose Quartz (ID: 316395)
11.67 ct Rose Quartz
16 x 12.1 mm
$ 14.00
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ID: 4334761 pcs
thumb image of 12.1ct Oval Facet Light Green Blue Aquamarine (ID: 433476)
12.05 ct Aquamarine
15.7 x 14.6 mm
$ 1618.07
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ID: 3163971 pcs
thumb image of 11.8ct Oval Cabochon Pink Rose Quartz (ID: 316397)
11.75 ct Rose Quartz
14.2 x 12.1 mm
$ 14.10
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ID: 4378081 pcs
thumb image of 11.5ct Pear Facet Pink Kunzite (ID: 437808)
11.53 ct Kunzite
15.6 x 11.3 mm
$ 92.24
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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