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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (133): Star Cabochons Star Sapphire, Star Ruby, Star Moonstone, Star Rose Quartz, Star Diopside, Star Sunstone, Star Garnet, Star Lemon Quartz Clear All
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ID: 4318841 pcs
thumb image of 32ct Oval Cabochon Black Red Star Garnet (ID: 431884)
31.96 ct Star Garnet
18.4 x 12.5 mm
$ 71.59
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ID: 3258021 pcs
thumb image of 67ct Oval Cabochon Reddish Black Star Garnet (ID: 325802)
66.95 ct Star Garnet
21.8 x 18.6 mm
$ 334.75
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ID: 3506401 pcs
thumb image of 32.7ct Oval Cabochon Black Star Sapphire (ID: 350640)
32.74 ct Star Sapphire
19.4 x 16.4 mm
$ 892.49
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ID: 4139681 pcs
thumb image of 18.8ct Oval Cabochon Cream Star Moonstone (ID: 413968)
18.80 ct Star Moonstone
15.6 x 14 mm
$ 75.20
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ID: 4031961 pcs
thumb image of 13.8ct Oval Cabochon Cream Star Moonstone (ID: 403196)
13.75 ct Star Moonstone
15.9 x 11.8 mm
$ 48.54
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ID: 4038841 pcs
thumb image of 56.5ct Round Cabochon Black Red Star Garnet (ID: 403884)
56.50 ct Star Garnet
20.9 mm
$ 169.50
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ID: 3506591 pcs
thumb image of 6.2ct Oval Cabochon Black Star Sapphire (ID: 350659)
6.22 ct Star Sapphire
12.6 x 8.5 mm
$ 120.11
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ID: 3906451 pcs
thumb image of 10.1ct Oval Cabochon Black Star Sapphire (ID: 390645)
10.09 ct Star Sapphire
13.7 x 11.3 mm
$ 151.35
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ID: 3906501 pcs
thumb image of 9.9ct Oval Cabochon Black Star Sapphire (ID: 390650)
9.89 ct Star Sapphire
14.2 x 11.9 mm
$ 148.35
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ID: 4139731 pcs
thumb image of 8ct Oval Cabochon Cream Star Moonstone (ID: 413973)
8.03 ct Star Moonstone
18.1 x 11.1 mm
$ 32.12
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ID: 3939711 pcs
thumb image of 6.8ct Pear Cabochon Black Star Sapphire (ID: 393971)
6.82 ct Star Sapphire
12.4 x 9.4 mm
$ 58.79
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ID: 4141541 pcs
thumb image of 113.9ct Round Cabochon Black Red Star Garnet (ID: 414154)
113.94 ct Star Garnet
28.7 mm
$ 341.82
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ID: 4038871 pcs
thumb image of 60.6ct Round Cabochon Black Red Star Garnet (ID: 403887)
60.59 ct Star Garnet
23.8 mm
$ 181.77
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ID: 3547631 pcs
thumb image of 383ct Oval Cabochon Pink Star Rose Quartz (ID: 354763)
382.95 ct Star Rose Quartz
44.4 x 42.5 mm
$ 765.90
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ID: 4141411 pcs
thumb image of 43.1ct Oval Cabochon Black Red Star Garnet (ID: 414141)
43.14 ct Star Garnet
23.2 x 19 mm
$ 129.42
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ID: 3906481 pcs
thumb image of 7.2ct Oval Cabochon Black Star Sapphire (ID: 390648)
7.17 ct Star Sapphire
12.6 x 9.6 mm
$ 107.55
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ID: 4140451 pcs
thumb image of 29.5ct Oval Cabochon Black Red Star Garnet (ID: 414045)
29.48 ct Star Garnet
19.2 x 15.2 mm
$ 88.44
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ID: 4030671 pcs
thumb image of 22.8ct Oval Cabochon Cream Star Moonstone (ID: 403067)
22.78 ct Star Moonstone
17.8 x 14.5 mm
$ 80.41
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ID: 4141441 pcs
thumb image of 51.3ct Oval Cabochon Black Red Star Garnet (ID: 414144)
51.33 ct Star Garnet
22.9 x 19.1 mm
$ 153.99
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ID: 3547641 pcs
thumb image of 270.2ct Round Cabochon Pink Star Rose Quartz (ID: 354764)
270.20 ct Star Rose Quartz
37.2 mm
$ 540.40
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ID: 4141511 pcs
thumb image of 38.7ct Round Cabochon Black Red Star Garnet (ID: 414151)
38.73 ct Star Garnet
20.5 mm
$ 116.19
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Star Cabochons
In the world of gemstones, there is a small but special group of gems known to exhibit chatoyancy, either in the form of 'simple' chatoyancy, cat's eye chatoyancy or asterism (star chatoyancy). Gems that display the star effect are rare and fascinating. Chatoyancy is one of several forms of optical phenomena; other forms of optical phenomena include (but are not limited to) color-change, iridescence (the rainbow effect) and adularescence (shimmering light). Gems which display chatoyancy are known as 'phenomenal gemstones' and are heavily prized by jewelers and collectors for their rare and unique visible traits. The star phenomena is known to occur in only a handful of different gem types, such as star sapphire, star ruby, star garnet, star quartz, star moonstone and star diopside.

The value of star gemstones usually depends on the clarity of the 'star'. Gems which display sharp, clear and well-centered stars are generally considered to be of higher quality. In addition, gems which show stars from wider angles and under all different types of lighting are valued the most. Most star gemstones will often show their chatoyancy only when viewed under a single strong and focused light source; it is usually very difficult to see any asterism under diffused light. When viewing a star gemstone, it is best to use a flashlight or penlight while tilting the gem and light back and forth. This should cause the star to appear to glide across the stone's surface. Star gemstones are always cut en cabochon, as this is the best way to maximize chatoyancy. Gem cutters must be careful when working with star gemstones, as it requires great skill to properly shape and orient the stones.
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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