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You Selected (646): 13 Carat Gems Clear All
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ID: 4089251 pcs
thumb image of 13.1ct Oval Cabochon Blue Hemimorphite (ID: 408925)
13.12 ct Hemimorphite
14.6 x 12.3 mm
$ 432.96
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ID: 3421031 pcs
thumb image of 13.1ct Baguette Sugarloaf Cabochon Multicolor Green Malachite (ID: 342103)
13.07 ct Malachite
12.3 x 10.1 mm
$ 16.99
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ID: 4811781 pcs
thumb image of 13.4ct Oval Cabochon Multicolor Agate (ID: 481178)
13.35 ct Agate
13.5 x 11.4 mm
$ 7.21
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ID: 4503741 pcs
thumb image of 13.5ct Octagon / Scissor Cut Light Blue Aquamarine (ID: 450374)
13.54 ct Aquamarine
19.3 x 9.7 mm
$ 3,385.00
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ID: 4027891 pcs
thumb image of 13.1ct Octagon Step Cut Bi-color Tourmaline (ID: 402789)
13.13 ct Tourmaline
12.3 x 11.5 mm
$ 2,109.50
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ID: 3704321 pcs
thumb image of 12.9ct Oval Cabochon Multicolor Jasper (ID: 370432)
12.87 ct Jasper
19.9 x 15 mm
$ 19.30
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ID: 4892531 pcs
thumb image of 13.7ct Fancy Cabochon Multicolor Fire Agate (ID: 489253)
13.68 ct Fire Agate
18.8 x 15.7 mm
$ 106.57
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ID: 3821041 pcs
thumb image of 13.9ct Octagon Step Cut Golden Apatite (ID: 382104)
13.92 ct Apatite
13.2 x 15.6 mm
$ 895.49
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ID: 4688801 pcs
thumb image of 13.3ct Oval Facet Pink Kunzite (ID: 468880)
13.32 ct Kunzite
16.2 x 10.9 mm
$ 125.61
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ID: 4202941 pcs
thumb image of 12.7ct Oval Cabochon Green Jadeite (ID: 420294)
12.74 ct Jadeite
19.1 x 14.7 mm
$ 38.22
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ID: 4869771 pcs
thumb image of 12.9ct Fancy Cabochon Multicolor Fire Agate (ID: 486977)
12.90 ct Fire Agate
25.2 x 14.7 mm
$ 99.72
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ID: 4185421 pcs
thumb image of 13ct Oval Cabochon Cream Star Moonstone (ID: 418542)
13.02 ct Star Moonstone
18.1 x 14.2 mm
$ 52.08
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ID: 3241061 pcs
thumb image of 13.6ct Oval Cabochon Pink Rose Quartz (ID: 324106)
13.60 ct Rose Quartz
16.1 x 12.2 mm
$ 16.32
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ID: 4503761 pcs
thumb image of 13.9ct Octagon / Scissor Cut Light Blue Aquamarine (ID: 450376)
13.90 ct Aquamarine
25.6 x 8.4 mm
$ 2,780.00
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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: 4869441 pcs
thumb image of 14ct Octagon Step Cut Orange Spessartite Garnet (ID: 486944)
13.99 ct Spessartite Garnet
20.6 x 8.3 mm
$ 559.60
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ID: 4843881 pcs
thumb image of 12.5ct Oval Cabochon Cream Star Moonstone (ID: 484388)
12.51 ct Star Moonstone
15.3 x 13.2 mm
$ 50.04
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ID: 4708091 pcs
thumb image of 13.5ct Oval Cabochon Grayish Silver Star Sapphire (ID: 470809)
13.46 ct Star Sapphire
13.7 x 11.6 mm
$ 471.10
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ID: 3983631 pcs
thumb image of 13.9ct Oval Facet Greenish Golden Apatite (ID: 398363)
13.86 ct Apatite
16.3 x 14.3 mm
$ 659.87
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ID: 4621361 pcs
thumb image of 13.7ct Oval Cabochon Multicolor Opal (ID: 462136)
13.65 ct Opal
22.1 x 20.7 mm
$ 549.55
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ID: 4422361 pcs
thumb image of 13.8ct Pear Cabochon Multicolor Opal in Matrix (ID: 442236)
13.84 ct Opal in Matrix
18 x 13.4 mm
$ 206.49
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13 Carat Gems
Buy gems by weight. Shop from our extensive range of beautiful, natural 13 carat gems. Browse the largest selection of natural loose colored gemstones available in 13 carats. Our large gemstone selection includes many popular gem types, such as amethyst, citrine, topaz and turquoise, and lesser-known gems, including rhodochrosite, ammolite and maw-sit-sit. 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 'tourmaline' to see all of our 13-carat tourmaline gems. Select 'multicolor' to shop for 13-carat multicolor 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