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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: 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: 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: 2888231 pcs
thumb image of 26.5ct Round Cabochon Reddish Black Star Garnet (ID: 288823)
26.52ct Star Garnet
15.06 x 9.94mm
USD 132.60
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ID: 3884601 pcs
thumb image of 9.4ct Oval Cabochon Black Star Sapphire (ID: 388460)
9.40ct Star Sapphire
12.90 x 10.40 x 5.67mm
USD 152.66
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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: 4140941 pcs
thumb image of 6.5ct Oval Cabochon Cream Peach Star Moonstone (ID: 414094)
6.47ct Star Moonstone
10.90 x 9.86 x 7.89mm
USD 25.88
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ID: 3153731 pcs
thumb image of 10.6ct Oval Cabochon Cream Star Moonstone (ID: 315373)
10.60ct Star Moonstone
13.86 x 12.50 x 9.08mm
USD 42.40
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ID: 4141921 pcs
thumb image of 8.4ct Oval Cabochon Cream Peach Star Moonstone (ID: 414192)
8.39ct Star Moonstone
15.73 x 10.74 x 6.56mm
USD 33.56
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ID: 3875331 pcs
thumb image of 6.7ct Oval Cabochon Black Star Sapphire (ID: 387533)
6.66ct Star Sapphire
11.32 x 8.78 x 6.00mm
USD 133.20
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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: 3258021 pcs
thumb image of 67ct Oval Cabochon Reddish Black Star Garnet (ID: 325802)
66.95ct Star Garnet
21.81 x 18.62 x 13.30mm
USD 334.75
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ID: 3875261 pcs
thumb image of 8.3ct Oval Cabochon Black Star Sapphire (ID: 387526)
8.31ct Star Sapphire
13.25 x 9.94 x 5.87mm
USD 166.20
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ID: 3052491 pcs
thumb image of 156.6ct Oval Cabochon Pink Star Rose Quartz (ID: 305249)
156.55ct Star Rose Quartz
32.05 x 28.33 x 23.24mm
USD 344.41
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ID: 3884001 pcs
thumb image of 10.1ct Oval Cabochon Black Star Sapphire (ID: 388400)
10.12ct Star Sapphire
13.79 x 11.60 x 5.52mm
USD 164.35
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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: 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: 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: 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: 3875341 pcs
thumb image of 6.6ct Oval Cabochon Black Star Sapphire (ID: 387534)
6.57ct Star Sapphire
11.79 x 8.72 x 5.93mm
USD 131.40
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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: 2135191 pcs
thumb image of 22.4ct Round Cabochon Orange Cream Star Moonstone (ID: 213519)
22.41ct Star Moonstone
16.50 x 11.78mm
USD 89.64
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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