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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (172): Star Cabochon Gemstones 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: 4141951 pcs
9.07ct Star Moonstone
14.19mm x 9.91mm x 8.59mm
USD 36.28
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ID: 4141411 pcs
43.14ct Star Garnet
23.15mm x 18.96mm x 8.99mm
USD 129.42
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ID: 3052481 pcs
121.00ct Star Rose Quartz
28.56mm x 27.18mm x 21.31mm
USD 266.20
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ID: 4139701 pcs
17.15ct Star Moonstone
17.14mm x 13.65mm x 10.26mm
USD 68.60
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ID: 4141941 pcs
10.34ct Star Moonstone
13.93mm x 10.54mm x 9.02mm
USD 41.36
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ID: 4139731 pcs
8.03ct Star Moonstone
18.13mm x 11.05mm x 5.28mm
USD 32.12
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ID: 3801941 pcs
47.52ct Star Garnet
18.56mm x 12.01mm
USD 237.60
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ID: 3052491 pcs
156.55ct Star Rose Quartz
32.05mm x 28.33mm x 23.24mm
USD 344.41
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ID: 4141041 pcs
7.34ct Star Moonstone
12.83mm x 9.35mm x 7.92mm
USD 29.36
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ID: 3547631 pcs
382.95ct Star Rose Quartz
44.35mm x 42.53mm x 29.30mm
USD 765.90
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ID: 4140011 pcs
5.96ct Star Moonstone
13.22mm x 9.65mm x 6.22mm
USD 23.84
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ID: 3256251 pcs
31.18ct Star Garnet
17.50mm x 14.10mm x 11.31mm
USD 155.90
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ID: 4030671 pcs
22.78ct Star Moonstone
17.78mm x 14.53mm x 12.06mm
USD 80.41
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ID: 3858591 pcs
12.36ct Star Sapphire
14.05mm x 10.95mm x 6.82mm
USD 185.40
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ID: 4140851 pcs
6.89ct Star Moonstone
12.32mm x 10.14mm x 7.37mm
USD 27.56
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ID: 3858531 pcs
8.71ct Star Sapphire
12.96mm x 10.14mm x 5.70mm
USD 130.65
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ID: 4141351 pcs
29.16ct Star Garnet
20.73mm x 17.19mm x 7.24mm
USD 87.48
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ID: 4040061 pcs
91.05ct Star Garnet
28.41mm x 24.05mm x 12.47mm
USD 273.15
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ID: 4038871 pcs
60.59ct Star Garnet
23.75mm x 10.29mm
USD 181.77
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ID: 2135221 pcs
19.71ct Star Moonstone
17.79mm x 9.36mm
USD 78.84
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ID: 4140931 pcs
6.88ct Star Moonstone
11.81mm x 10.20mm x 7.60mm
USD 27.52
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Star Cabochon Gemstones
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