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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (165): 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: 4140931 pcs
6.88ct Star Moonstone
11.81 x 10.20 x 7.60mm
USD 27.52
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ID: 4139691 pcs
16.54ct Star Moonstone
18.75 x 12.81 x 9.53mm
USD 66.16
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ID: 4140071 pcs
4.32ct Star Moonstone
10.73 x 8.65 x 6.23mm
USD 17.28
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ID: 4038921 pcs
40.30ct Star Garnet
21.29 x 17.93 x 9.62mm
USD 120.90
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ID: 4141361 pcs
30.03ct Star Garnet
20.92 x 16.91 x 7.48mm
USD 90.09
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ID: 4139701 pcs
17.15ct Star Moonstone
17.14 x 13.65 x 10.26mm
USD 68.60
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ID: 4033101 pcs
24.71ct Star Moonstone
16.79 x 12.70mm
USD 87.23
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ID: 4029541 pcs
13.92ct Star Moonstone
17.13 x 13.21 x 8.72mm
USD 49.14
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ID: 4141461 pcs
39.02ct Star Garnet
17.22 x 11.17mm
USD 117.06
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ID: 3506421 pcs
32.66ct Star Sapphire
18.76 x 14.98 x 9.42mm
USD 890.31
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ID: 4140371 pcs
30.27ct Star Garnet
17.75 x 13.76 x 10.78mm
USD 90.81
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ID: 3884601 pcs
9.40ct Star Sapphire
12.90 x 10.40 x 5.67mm
USD 152.66
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ID: 3734551 pcs
89.17ct Star Lemon Quartz
25.23 x 23.98 x 19.62mm
USD 267.51
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ID: 3506351 pcs
9.00ct Star Sapphire
13.19 x 9.46 x 5.97mm
USD 173.79
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ID: 3906511 pcs
6.38ct Star Sapphire
11.56 x 9.14 x 5.29mm
USD 95.70
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ID: 3734541 pcs
85.89ct Star Lemon Quartz
24.98 x 22.98 x 19.88mm
USD 257.67
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ID: 3508921 pcs
20.32ct Star Sapphire
19.21 x 15.86 x 6.05mm
USD 553.92
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ID: 3506411 pcs
32.25ct Star Sapphire
18.37 x 16.45 x 8.83mm
USD 879.14
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ID: 4140011 pcs
5.96ct Star Moonstone
13.22 x 9.65 x 6.22mm
USD 23.84
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ID: 4139671 pcs
12.79ct Star Moonstone
15.93 x 13.43 x 8.27mm
USD 51.16
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ID: 4141481 pcs
56.81ct Star Garnet
23.20 x 18.82 x 11.42mm
USD 170.43
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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