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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (131): 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: 3508931 pcs
thumb image of 27.2ct Oval Cabochon Black Star Sapphire (ID: 350893)
27.17 ct Star Sapphire
17.9 x 14.7 mm
$ 740.65
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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: 3734561 pcs
thumb image of 81.2ct Round Cabochon Lemon Star Lemon Quartz (ID: 373456)
81.22 ct Star Lemon Quartz
23.7 mm
$ 243.66
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ID: 3444381 pcs
thumb image of 236.3ct Oval Cabochon Pink Star Rose Quartz (ID: 344438)
236.30 ct Star Rose Quartz
38.2 x 36.2 mm
$ 590.75
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ID: 3734551 pcs
thumb image of 89.2ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373455)
89.17 ct Star Lemon Quartz
25.2 x 24 mm
$ 267.51
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ID: 4038911 pcs
thumb image of 80.8ct Round Cabochon Black Red Star Garnet (ID: 403891)
80.78 ct Star Garnet
24.4 mm
$ 242.34
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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: 2621091 pcs
thumb image of 15.9ct Oval Cabochon Orange Cream Star Moonstone (ID: 262109)
15.93 ct Star Moonstone
14.2 x 13.4 mm
$ 63.72
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ID: 4140851 pcs
thumb image of 6.9ct Oval Cabochon Cream Peach Star Moonstone (ID: 414085)
6.89 ct Star Moonstone
12.3 x 10.1 mm
$ 27.56
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ID: 3906521 pcs
thumb image of 10.4ct Oval Cabochon Black Star Sapphire (ID: 390652)
10.43 ct Star Sapphire
13.2 x 10.4 mm
$ 156.45
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ID: 3149961 pcs
thumb image of 150.3ct Oval Cabochon Pink Star Rose Quartz (ID: 314996)
150.25 ct Star Rose Quartz
33.6 x 29.5 mm
$ 300.50
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ID: 4031891 pcs
thumb image of 11.6ct Round Cabochon Cream Star Moonstone (ID: 403189)
11.58 ct Star Moonstone
13.3 mm
$ 40.88
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ID: 3875341 pcs
thumb image of 6.6ct Oval Cabochon Black Star Sapphire (ID: 387534)
6.57 ct Star Sapphire
11.8 x 8.7 mm
$ 131.40
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ID: 3508861 pcs
thumb image of 8ct Oval Cabochon Black Star Sapphire (ID: 350886)
7.96 ct Star Sapphire
13.8 x 10.6 mm
$ 153.71
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ID: 4139651 pcs
thumb image of 9.8ct Oval Cabochon Cream Star Moonstone (ID: 413965)
9.78 ct Star Moonstone
14.9 x 12.7 mm
$ 39.12
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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: 3858571 pcs
thumb image of 10.6ct Oval Cabochon Black Star Sapphire (ID: 385857)
10.64 ct Star Sapphire
14.3 x 12.2 mm
$ 159.60
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ID: 4038851 pcs
thumb image of 49.9ct Round Cabochon Black Red Star Garnet (ID: 403885)
49.87 ct Star Garnet
22.5 mm
$ 149.61
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ID: 3858531 pcs
thumb image of 8.7ct Oval Cabochon Black Star Sapphire (ID: 385853)
8.71 ct Star Sapphire
13 x 10.1 mm
$ 130.65
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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: 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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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

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