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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (158): 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: 4031911 pcs
thumb image of 14.9ct Oval Cabochon Cream Star Moonstone (ID: 403191)
14.92ct Star Moonstone
15.70 x 12.71 x 10.00mm
USD 52.67
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ID: 4033101 pcs
thumb image of 24.7ct Round Cabochon Cream Star Moonstone (ID: 403310)
24.71ct Star Moonstone
16.79 x 12.70mm
USD 87.23
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ID: 4141431 pcs
thumb image of 49.1ct Oval Cabochon Black Red Star Garnet (ID: 414143)
49.09ct Star Garnet
22.20 x 19.29 x 9.77mm
USD 147.27
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ID: 4038841 pcs
thumb image of 56.5ct Round Cabochon Black Red Star Garnet (ID: 403884)
56.50ct Star Garnet
20.85 x 12.22mm
USD 169.50
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ID: 3139791 pcs
thumb image of 133.2ct Oval Cabochon Pink Star Rose Quartz (ID: 313979)
133.15ct Star Rose Quartz
31.59 x 29.05 x 19.59mm
USD 266.30
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ID: 4040071 pcs
thumb image of 92.7ct Oval Cabochon Black Red Star Garnet (ID: 404007)
92.68ct Star Garnet
29.11 x 23.96 x 12.78mm
USD 278.04
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ID: 4141381 pcs
thumb image of 35.8ct Oval Cabochon Black Red Star Garnet (ID: 414138)
35.84ct Star Garnet
22.97 x 17.93 x 7.75mm
USD 107.52
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ID: 4318841 pcs
thumb image of 32ct Oval Cabochon Black Red Star Garnet (ID: 431884)
31.96ct Star Garnet
18.43 x 12.52 x 11.61mm
USD 71.59
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ID: 3861041 pcs
thumb image of 8.7ct Oval Cabochon Black Star Sapphire (ID: 386104)
8.73ct Star Sapphire
12.44 x 9.37 x 6.31mm
USD 84.16
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ID: 4141041 pcs
thumb image of 7.3ct Oval Cabochon Peach Orange Star Moonstone (ID: 414104)
7.34ct Star Moonstone
12.83 x 9.35 x 7.92mm
USD 29.36
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ID: 4139701 pcs
thumb image of 17.2ct Oval Cabochon Cream Star Moonstone (ID: 413970)
17.15ct Star Moonstone
17.14 x 13.65 x 10.26mm
USD 68.60
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ID: 4038861 pcs
thumb image of 49.7ct Round Cabochon Black Red Star Garnet (ID: 403886)
49.69ct Star Garnet
24.12 x 8.42mm
USD 149.07
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ID: 3734601 pcs
thumb image of 55.5ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373460)
55.45ct Star Lemon Quartz
22.47 x 19.70 x 16.95mm
USD 166.35
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ID: 4038881 pcs
thumb image of 66ct Round Cabochon Black Red Star Garnet (ID: 403888)
65.99ct Star Garnet
22.85 x 11.66mm
USD 197.97
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ID: 3858571 pcs
thumb image of 10.6ct Oval Cabochon Black Star Sapphire (ID: 385857)
10.64ct Star Sapphire
14.30 x 12.17 x 5.37mm
USD 159.60
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ID: 3149961 pcs
thumb image of 150.3ct Oval Cabochon Pink Star Rose Quartz (ID: 314996)
150.25ct Star Rose Quartz
33.56 x 29.50 x 21.13mm
USD 300.50
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ID: 4033061 pcs
thumb image of 17.3ct Oval Cabochon Cream Star Moonstone (ID: 403306)
17.30ct Star Moonstone
19.41 x 15.76 x 8.22mm
USD 61.07
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ID: 4040051 pcs
thumb image of 71.4ct Oval Cabochon Black Red Star Garnet (ID: 404005)
71.36ct Star Garnet
26.99 x 21.20 x 11.97mm
USD 214.08
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ID: 3939711 pcs
thumb image of 6.8ct Pear Cabochon Black Star Sapphire (ID: 393971)
6.82ct Star Sapphire
12.40 x 9.35 x 5.09mm
USD 58.79
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ID: 4040111 pcs
thumb image of 159.1ct Oval Cabochon Black Red Star Garnet (ID: 404011)
159.09ct Star Garnet
32.28 x 29.05 x 16.02mm
USD 477.27
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ID: 3444381 pcs
thumb image of 236.3ct Oval Cabochon Pink Star Rose Quartz (ID: 344438)
236.30ct Star Rose Quartz
38.16 x 36.21 x 25.38mm
USD 590.75
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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