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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (171): 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: 4038941 pcs
43.01ct Star Garnet
22.23 x 19.80 x 9.42mm
USD 129.03
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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: 4141421 pcs
45.93ct Star Garnet
20.79 x 18.14 x 10.60mm
USD 137.79
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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: 3444381 pcs
236.30ct Star Rose Quartz
38.16 x 36.21 x 25.38mm
USD 590.75
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ID: 3884491 pcs
7.53ct Star Sapphire
12.46 x 9.78 x 5.05mm
USD 122.29
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ID: 4141461 pcs
39.02ct Star Garnet
17.22 x 11.17mm
USD 117.06
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ID: 3072921 pcs
147.25ct Star Rose Quartz
30.38 x 27.97 x 23.91mm
USD 294.50
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ID: 3734521 pcs
84.63ct Star Lemon Quartz
25.18 x 22.54 x 19.54mm
USD 253.89
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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: 4139681 pcs
18.80ct Star Moonstone
15.57 x 13.98 x 11.63mm
USD 75.20
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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: 3547621 pcs
579.55ct Star Rose Quartz
57.01 x 45.75 x 34.63mm
USD 1159.10
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ID: 4040071 pcs
92.68ct Star Garnet
29.11 x 23.96 x 12.78mm
USD 278.04
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ID: 4140021 pcs
5.46ct Star Moonstone
12.43 x 9.68 x 6.24mm
USD 21.84
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ID: 4141411 pcs
43.14ct Star Garnet
23.15 x 18.96 x 8.99mm
USD 129.42
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ID: 3876811 pcs
4.58ct Star Sapphire
11.79 x 8.90 x 3.92mm
USD 91.60
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ID: 4040081 pcs
93.06ct Star Garnet
29.15 x 25.57 x 11.64mm
USD 279.18
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ID: 4033061 pcs
17.30ct Star Moonstone
19.41 x 15.76 x 8.22mm
USD 61.07
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ID: 2621091 pcs
15.93ct Star Moonstone
14.19 x 13.36 x 11.53mm
USD 63.72
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ID: 4141511 pcs
38.73ct Star Garnet
20.48 x 8.57mm
USD 116.19
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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

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