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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (811): Star 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: 4909361 pcs
thumb image of 5.4ct Round Cabochon Cream Star Moonstone (ID: 490936)
5.37 ct Star Moonstone
10 mm
$ 10.74
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ID: 4708441 pcs
thumb image of 21.2ct Round Cabochon Grayish Silver Star Sapphire (ID: 470844)
21.23 ct Star Sapphire
14.7 mm
$ 743.05
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ID: 4693002 pcs
thumb image of 2ct Oval Cabochon Blue Star Sapphire (ID: 469300)
2.02 ct Star Sapphire
6.9 x 5.1 mm
$ 40.40
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ID: 3258141 pcs
thumb image of 17.3ct Oval Cabochon Cream Star Moonstone (ID: 325814)
17.25 ct Star Moonstone
17.9 x 14 mm
$ 69.00
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ID: 4909381 pcs
thumb image of 5.7ct Oval Cabochon Cream Star Moonstone (ID: 490938)
5.72 ct Star Moonstone
12.1 x 10.4 mm
$ 11.44
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ID: 3506401 pcs
thumb image of 32.7ct Oval Cabochon Black Star Sapphire (ID: 350640)
32.74 ct Star Sapphire
19.4 x 16.4 mm
$ 655.75
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ID: 4872491 pcs
thumb image of 1.3ct Oval Cabochon Black Star Sapphire (ID: 487249)
1.26 ct Star Sapphire
8.2 x 6.4 mm
$ 12.60
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ID: 2621091 pcs
thumb image of 15.9ct Oval Cabochon Orange Cream Star Moonstone (ID: 262109)
15.93 ct Star Moonstone
14.2 x 13.4 mm
$ 63.72
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ID: 4906131 pcs
thumb image of 5.9ct Oval Cabochon Cream Star Moonstone (ID: 490613)
5.87 ct Star Moonstone
11.6 x 9.8 mm
$ 11.74
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ID: 4928491 pcs
thumb image of 114.5ct Oval Cabochon Lemon Star Lemon Quartz (ID: 492849)
114.50 ct Star Lemon Quartz
26.6 x 25.5 mm
$ 229.00
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ID: 4867731 pcs
thumb image of 1.5ct Oval Cabochon Black Star Sapphire (ID: 486773)
1.48 ct Star Sapphire
7.9 x 6.1 mm
$ 14.80
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ID: 3734571 pcs
thumb image of 67.5ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373457)
67.54 ct Star Lemon Quartz
23.5 x 20.4 mm
$ 202.62
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ID: 3734521 pcs
thumb image of 84.6ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373452)
84.63 ct Star Lemon Quartz
25.2 x 22.5 mm
$ 253.89
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ID: 4904421 pcs
thumb image of 6.3ct Oval Cabochon Cream Star Moonstone (ID: 490442)
6.27 ct Star Moonstone
13.8 x 10.5 mm
$ 12.54
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ID: 4692291 pcs
thumb image of 50.9ct Oval Cabochon Lemon Star Lemon Quartz (ID: 469229)
50.90 ct Star Lemon Quartz
23.1 x 20 mm
$ 106.89
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ID: 3508911 pcs
thumb image of 27.3ct Oval Cabochon Black Star Sapphire (ID: 350891)
27.29 ct Star Sapphire
19.4 x 16.5 mm
$ 545.80
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ID: 3734551 pcs
thumb image of 89.2ct Oval Cabochon Lemon Star Lemon Quartz (ID: 373455)
89.17 ct Star Lemon Quartz
25.2 x 24 mm
$ 267.51
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ID: 3734561 pcs
thumb image of 81.2ct Round Cabochon Lemon Star Lemon Quartz (ID: 373456)
81.22 ct Star Lemon Quartz
23.7 mm
$ 243.66
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ID: 4686051 pcs
thumb image of 7.8ct Oval Cabochon Purplish Red Star Ruby (ID: 468605)
7.81 ct Star Ruby
12.3 x 10 mm
$ 62.48
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ID: 2231741 pcs
thumb image of 30.5ct Oval Cabochon Black Star Sapphire (ID: 223174)
30.49 ct Star Sapphire
18.9 x 17.4 mm
$ 533.57
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ID: 4909391 pcs
thumb image of 6.8ct Round Cabochon Cream Star Moonstone (ID: 490939)
6.81 ct Star Moonstone
11.5 mm
$ 13.62
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Star 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