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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (164): 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: 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: 3858581 pcs
thumb image of 9.8ct Oval Cabochon Black Star Sapphire (ID: 385858)
9.82ct Star Sapphire
12.09 x 10.78 x 6.37mm
USD 147.30
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ID: 3861021 pcs
thumb image of 9.7ct Oval Cabochon Black Star Sapphire (ID: 386102)
9.74ct Star Sapphire
13.78 x 10.16 x 5.79mm
USD 93.89
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ID: 4141051 pcs
thumb image of 8.6ct Oval Cabochon Cream Star Moonstone (ID: 414105)
8.56ct Star Moonstone
12.68 x 10.21 x 8.39mm
USD 34.24
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ID: 3858591 pcs
thumb image of 12.4ct Oval Cabochon Black Star Sapphire (ID: 385859)
12.36ct Star Sapphire
14.05 x 10.95 x 6.82mm
USD 185.40
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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: 4140041 pcs
thumb image of 4.9ct Oval Cabochon Cream Peach Star Moonstone (ID: 414004)
4.90ct Star Moonstone
11.93 x 9.62 x 5.81mm
USD 19.60
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ID: 3734541 pcs
thumb image of 85.9ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373454)
85.89ct Star Lemon Quartz
24.98 x 22.98 x 19.88mm
USD 257.67
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ID: 3153761 pcs
thumb image of 14.6ct Round Cabochon Smoke Star Moonstone (ID: 315376)
14.61ct Star Moonstone
13.47 x 10.84mm
USD 58.44
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ID: 3876881 pcs
thumb image of 4.5ct Oval Cabochon Black Star Sapphire (ID: 387688)
4.46ct Star Sapphire
12.26 x 8.89 x 3.49mm
USD 89.20
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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: 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: 3876811 pcs
thumb image of 4.6ct Oval Cabochon Black Star Sapphire (ID: 387681)
4.58ct Star Sapphire
11.79 x 8.90 x 3.92mm
USD 91.60
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ID: 3885381 pcs
thumb image of 6.3ct Oval Cabochon Black Star Sapphire (ID: 388538)
6.32ct Star Sapphire
14.65 x 11.58 x 3.20mm
USD 150.54
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ID: 3444391 pcs
thumb image of 105.3ct Oval Cabochon Pink Star Rose Quartz (ID: 344439)
105.30ct Star Rose Quartz
30.43 x 26.06 x 18.75mm
USD 264.50
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ID: 2135221 pcs
thumb image of 19.7ct Round Cabochon Orange Cream Star Moonstone (ID: 213522)
19.71ct Star Moonstone
17.79 x 9.36mm
USD 78.84
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ID: 3862761 pcs
thumb image of 9.4ct Oval Cabochon Black Star Sapphire (ID: 386276)
9.40ct Star Sapphire
13.43 x 10.57 x 6.01mm
USD 90.62
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ID: 3801941 pcs
thumb image of 47.5ct Round Cabochon Reddish Black Star Garnet (ID: 380194)
47.52ct Star Garnet
18.56 x 12.01mm
USD 237.60
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ID: 3858521 pcs
thumb image of 13.9ct Oval Cabochon Black Star Sapphire (ID: 385852)
13.93ct Star Sapphire
14.85 x 11.74 x 7.00mm
USD 208.95
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ID: 4141521 pcs
thumb image of 97.3ct Round Cabochon Black Red Star Garnet (ID: 414152)
97.30ct Star Garnet
26.12 x 12.55mm
USD 291.90
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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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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