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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: 4141361 pcs
30.03ct Star Garnet
20.92 x 16.91 x 7.48mm
USD 90.09
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ID: 3876911 pcs
4.19ct Star Sapphire
11.54 x 9.14 x 3.49mm
USD 83.80
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ID: 4141381 pcs
35.84ct Star Garnet
22.97 x 17.93 x 7.75mm
USD 107.52
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ID: 3906501 pcs
9.89ct Star Sapphire
14.18 x 11.91 x 4.84mm
USD 148.35
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ID: 4038881 pcs
65.99ct Star Garnet
22.85 x 11.66mm
USD 197.97
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ID: 3547631 pcs
382.95ct Star Rose Quartz
44.35 x 42.53 x 29.30mm
USD 765.90
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ID: 3071711 pcs
17.55ct Star Moonstone
16.40 x 12.72 x 11.65mm
USD 70.20
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ID: 3906461 pcs
10.24ct Star Sapphire
13.09 x 10.55 x 6.39mm
USD 153.60
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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: 3444411 pcs
132.70ct Star Rose Quartz
31.75 x 27.37 x 22.06mm
USD 331.75
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ID: 4141511 pcs
38.73ct Star Garnet
20.48 x 8.57mm
USD 116.19
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ID: 4040061 pcs
91.05ct Star Garnet
28.41 x 24.05 x 12.47mm
USD 273.15
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ID: 4141051 pcs
8.56ct Star Moonstone
12.68 x 10.21 x 8.39mm
USD 34.24
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ID: 4038891 pcs
62.40ct Star Garnet
24.34 x 9.79mm
USD 187.20
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ID: 2231741 pcs
30.49ct Star Sapphire
18.85 x 17.41 x 7.76mm
USD 533.57
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ID: 4141541 pcs
113.94ct Star Garnet
28.67 x 12.89mm
USD 341.82
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ID: 4141001 pcs
8.80ct Star Moonstone
13.89 x 9.58 x 8.54mm
USD 35.20
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ID: 3508931 pcs
27.17ct Star Sapphire
17.94 x 14.68 x 8.44mm
USD 740.65
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ID: 4040091 pcs
93.53ct Star Garnet
29.36 x 24.28 x 12.24mm
USD 280.59
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ID: 4141421 pcs
45.93ct Star Garnet
20.79 x 18.14 x 10.60mm
USD 137.79
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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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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