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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: 3858501 pcs
thumb image of 13.1ct Oval Cabochon Black Star Sapphire (ID: 385850)
13.08ct Star Sapphire
13.82 x 11.12 x 7.34mm
USD 196.20
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ID: 3258111 pcs
thumb image of 20.6ct Oval Cabochon Cream Star Moonstone (ID: 325811)
20.62ct Star Moonstone
17.24 x 15.10 x 11.10mm
USD 82.48
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ID: 3906501 pcs
thumb image of 9.9ct Oval Cabochon Black Star Sapphire (ID: 390650)
9.89ct Star Sapphire
14.18 x 11.91 x 4.84mm
USD 148.35
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ID: 3072881 pcs
thumb image of 311.7ct Oval Cabochon Pink Star Rose Quartz (ID: 307288)
311.65ct Star Rose Quartz
43.53 x 42.00 x 24.42mm
USD 623.30
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ID: 4141411 pcs
thumb image of 43.1ct Oval Cabochon Black Red Star Garnet (ID: 414141)
43.14ct Star Garnet
23.15 x 18.96 x 8.99mm
USD 129.42
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ID: 4140461 pcs
thumb image of 30.1ct Round Cabochon Black Red Star Garnet (ID: 414046)
30.14ct Star Garnet
17.24 x 9.04mm
USD 90.42
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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: 3508921 pcs
thumb image of 20.3ct Oval Cabochon Black Star Sapphire (ID: 350892)
20.32ct Star Sapphire
19.21 x 15.86 x 6.05mm
USD 553.92
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ID: 4038911 pcs
thumb image of 80.8ct Round Cabochon Black Red Star Garnet (ID: 403891)
80.78ct Star Garnet
24.38 x 12.74mm
USD 242.34
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ID: 3506601 pcs
thumb image of 7ct Oval Cabochon Black Star Sapphire (ID: 350660)
7.01ct Star Sapphire
12.44 x 9.68 x 5.17mm
USD 135.36
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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: 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: 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: 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: 4141481 pcs
thumb image of 56.8ct Oval Cabochon Black Red Star Garnet (ID: 414148)
56.81ct Star Garnet
23.20 x 18.82 x 11.42mm
USD 170.43
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ID: 3053791 pcs
thumb image of 163.2ct Oval Cabochon Pink Star Rose Quartz (ID: 305379)
163.20ct Star Rose Quartz
32.07 x 28.75 x 23.21mm
USD 326.40
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ID: 3547631 pcs
thumb image of 383ct Oval Cabochon Pink Star Rose Quartz (ID: 354763)
382.95ct Star Rose Quartz
44.35 x 42.53 x 29.30mm
USD 765.90
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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: 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: 3506351 pcs
thumb image of 9ct Oval Cabochon Black Star Sapphire (ID: 350635)
9.00ct Star Sapphire
13.19 x 9.46 x 5.97mm
USD 173.79
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ID: 3072781 pcs
thumb image of 20.5ct Oval Cabochon Cream Star Moonstone (ID: 307278)
20.45ct Star Moonstone
18.36 x 12.54 x 12.15mm
USD 81.80
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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