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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (162): Star Gemstones 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: 4141521 pcs
thumb image of 97.3ct Round Cabochon Black Red Star Garnet (ID: 414152)
97.30 ct Star Garnet
26.1 mm
$ 291.90
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ID: 4040061 pcs
thumb image of 91.1ct Oval Cabochon Black Red Star Garnet (ID: 404006)
91.05 ct Star Garnet
28.4 x 24.1 mm
$ 273.15
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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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ID: 4040101 pcs
thumb image of 102.6ct Round Cabochon Black Red Star Garnet (ID: 404010)
102.57 ct Star Garnet
26.5 mm
$ 307.71
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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: 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: 4185631 pcs
thumb image of 6.9ct Oval Cabochon Cream Star Moonstone (ID: 418563)
6.90 ct Star Moonstone
16.3 x 9.2 mm
$ 27.60
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ID: 4141381 pcs
thumb image of 35.8ct Oval Cabochon Black Red Star Garnet (ID: 414138)
35.84 ct Star Garnet
23 x 17.9 mm
$ 107.52
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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: 4040071 pcs
thumb image of 92.7ct Oval Cabochon Black Red Star Garnet (ID: 404007)
92.68 ct Star Garnet
29.1 x 24 mm
$ 278.04
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ID: 4140371 pcs
thumb image of 30.3ct Oval Cabochon Black Red Star Garnet (ID: 414037)
30.27 ct Star Garnet
17.8 x 13.8 mm
$ 90.81
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ID: 4693104 pcs
thumb image of 3ct Oval Cabochon Blue Star Sapphire (ID: 469310)
3.01 ct Star Sapphire
7 x 5.2 mm
$ 60.20
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ID: 4040111 pcs
thumb image of 159.1ct Oval Cabochon Black Red Star Garnet (ID: 404011)
159.09 ct Star Garnet
32.3 x 29.1 mm
$ 477.27
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ID: 4141391 pcs
thumb image of 38.2ct Oval Cabochon Black Red Star Garnet (ID: 414139)
38.23 ct Star Garnet
21.3 x 17 mm
$ 114.69
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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: 4692882 pcs
thumb image of 3ct Oval Cabochon Blue Star Sapphire (ID: 469288)
3.03 ct Star Sapphire
7 x 5.2 mm
$ 60.60
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ID: 4180321 pcs
thumb image of 97.9ct Oval Cabochon Black Red Star Garnet (ID: 418032)
97.90 ct Star Garnet
24.7 x 22 mm
$ 489.50
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ID: 4038901 pcs
thumb image of 73.2ct Round Cabochon Black Red Star Garnet (ID: 403890)
73.16 ct Star Garnet
23.3 mm
$ 219.48
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ID: 4692852 pcs
thumb image of 3.1ct Oval Cabochon Blue Star Sapphire (ID: 469285)
3.11 ct Star Sapphire
7.1 x 5.2 mm
$ 62.20
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ID: 3153731 pcs
thumb image of 10.6ct Oval Cabochon Cream Star Moonstone (ID: 315373)
10.60 ct Star Moonstone
13.9 x 12.5 mm
$ 42.40
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ID: 4692862 pcs
thumb image of 2.6ct Oval Cabochon Blue Star Sapphire (ID: 469286)
2.64 ct Star Sapphire
7.2 x 5.2 mm
$ 52.80
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Star Gemstones
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