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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (175): 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: 4141921 pcs
8.39ct Star Moonstone
15.73mm x 10.74mm x 6.56mm
USD 33.56
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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: 3876881 pcs
4.46ct Star Sapphire
12.26mm x 8.89mm x 3.49mm
USD 89.20
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ID: 3258141 pcs
17.25ct Star Moonstone
17.86mm x 14.00mm x 9.45mm
USD 69.00
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ID: 4038871 pcs
60.59ct Star Garnet
23.75mm x 10.29mm
USD 181.77
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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: 4040081 pcs
93.06ct Star Garnet
29.15mm x 25.57mm x 11.64mm
USD 279.18
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ID: 4140041 pcs
4.90ct Star Moonstone
11.93mm x 9.62mm x 5.81mm
USD 19.60
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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: 3906491 pcs
8.81ct Star Sapphire
12.26mm x 9.45mm x 6.62mm
USD 132.15
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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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ID: 3884491 pcs
7.53ct Star Sapphire
12.46mm x 9.78mm x 5.05mm
USD 122.29
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ID: 3258111 pcs
20.62ct Star Moonstone
17.24mm x 15.10mm x 11.10mm
USD 82.48
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ID: 3858581 pcs
9.82ct Star Sapphire
12.09mm x 10.78mm x 6.37mm
USD 147.30
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ID: 3072881 pcs
311.65ct Star Rose Quartz
43.53mm x 42.00mm x 24.42mm
USD 623.30
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ID: 3734611 pcs
78.67ct Star Lemon Quartz
24.09mm x 22.70mm x 19.18mm
USD 236.01
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ID: 4031911 pcs
14.92ct Star Moonstone
15.70mm x 12.71mm x 10.00mm
USD 52.67
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ID: 3885361 pcs
11.11ct Star Sapphire
15.71mm x 13.40mm x 4.75mm
USD 264.64
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ID: 4029541 pcs
13.92ct Star Moonstone
17.13mm x 13.21mm x 8.72mm
USD 49.14
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ID: 3734561 pcs
81.22ct Star Lemon Quartz
23.69mm x 19.33mm
USD 243.66
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ID: 4139751 pcs
11.25ct Star Moonstone
17.29mm x 11.44mm x 7.34mm
USD 45.00
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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