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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (522): 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: 4711871 pcs
thumb image of 6.9ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471187)
6.94 ct Star Sunstone
12 x 10.4 mm
$ 13.88
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ID: 4788971 pcs
thumb image of 2.5ct Oval Cabochon Blue Star Sapphire (ID: 478897)
2.45 ct Star Sapphire
9.1 x 7.2 mm
$ 49.00
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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: 4711771 pcs
thumb image of 13.5ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471177)
13.47 ct Star Sunstone
15.1 x 13.3 mm
$ 26.94
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ID: 4040031 pcs
thumb image of 57.4ct Oval Cabochon Black Red Star Garnet (ID: 404003)
57.41 ct Star Garnet
23.8 x 21 mm
$ 172.23
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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: 4706891 pcs
thumb image of 2.9ct Oval Cabochon Purplish Red Star Ruby (ID: 470689)
2.91 ct Star Ruby
7.9 x 6.4 mm
$ 32.01
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ID: 4711791 pcs
thumb image of 6.9ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471179)
6.89 ct Star Sunstone
12.1 x 10.1 mm
$ 13.78
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ID: 4712261 pcs
thumb image of 5.9ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471226)
5.87 ct Star Sunstone
13.6 x 10.1 mm
$ 27.18
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ID: 4707711 pcs
thumb image of 3.2ct Oval Cabochon Purplish Red Star Ruby (ID: 470771)
3.18 ct Star Ruby
9 x 7.6 mm
$ 34.98
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ID: 4708361 pcs
thumb image of 10.6ct Oval Cabochon Grayish Silver Star Sapphire (ID: 470836)
10.61 ct Star Sapphire
13 x 11.3 mm
$ 371.35
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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: 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: 4742551 pcs
thumb image of 13.3ct Oval Cabochon Golden-Brown Star Sunstone (ID: 474255)
13.26 ct Star Sunstone
16.2 x 13.6 mm
$ 27.85
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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: 4787361 pcs
thumb image of 2.5ct Oval Cabochon Blue Star Sapphire (ID: 478736)
2.50 ct Star Sapphire
9.7 x 7.5 mm
$ 50.00
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ID: 3506411 pcs
thumb image of 32.3ct Oval Cabochon Black Star Sapphire (ID: 350641)
32.25 ct Star Sapphire
18.4 x 16.5 mm
$ 483.75
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ID: 4711711 pcs
thumb image of 6.2ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471171)
6.17 ct Star Sunstone
12.6 x 10.9 mm
$ 12.34
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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: 4705711 pcs
thumb image of 3.4ct Oval Cabochon Purplish Red Star Ruby (ID: 470571)
3.38 ct Star Ruby
8.3 x 7.1 mm
$ 37.18
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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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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