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Gemtype Color Shape Weight Size Date Clarity Price Origin
You Selected (525): 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: 4742541 pcs
thumb image of 5.4ct Oval Cabochon Golden-Brown Star Sunstone (ID: 474254)
5.36 ct Star Sunstone
12.8 x 10.3 mm
$ 11.26
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ID: 4787361 pcs
thumb image of 2.5ct Oval Cabochon Blue Star Sapphire (ID: 478736)
2.50 ct Star Sapphire
9.7 x 7.5 mm
$ 50.00
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ID: 4711861 pcs
thumb image of 9.5ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471186)
9.50 ct Star Sunstone
13.9 x 12 mm
$ 19.00
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ID: 4710091 pcs
thumb image of 5.4ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471009)
5.39 ct Star Sunstone
10.8 x 9.5 mm
$ 10.78
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ID: 4692394 pcs
thumb image of 2.6ct Oval Cabochon Blue Star Sapphire (ID: 469239)
2.57 ct Star Sapphire
6.9 x 5.1 mm
$ 51.40
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ID: 4712111 pcs
thumb image of 7.4ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471211)
7.44 ct Star Sunstone
13.4 x 11.3 mm
$ 34.45
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ID: 4711701 pcs
thumb image of 6.1ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471170)
6.08 ct Star Sunstone
11.4 x 9.4 mm
$ 12.16
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ID: 4703791 pcs
thumb image of 4.3ct Oval Cabochon Black Star Sapphire (ID: 470379)
4.32 ct Star Sapphire
10.8 x 8.8 mm
$ 86.40
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ID: 4735831 pcs
thumb image of 3.9ct Oval Cabochon Purplish Red Star Ruby (ID: 473583)
3.94 ct Star Ruby
8.4 x 7.3 mm
$ 43.34
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ID: 4031961 pcs
thumb image of 13.8ct Oval Cabochon Cream Star Moonstone (ID: 403196)
13.75 ct Star Moonstone
15.9 x 11.8 mm
$ 48.54
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ID: 3858591 pcs
thumb image of 12.4ct Oval Cabochon Black Star Sapphire (ID: 385859)
12.36 ct Star Sapphire
14.1 x 11 mm
$ 185.40
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ID: 4711881 pcs
thumb image of 9ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471188)
9.02 ct Star Sunstone
13.2 x 11.3 mm
$ 36.08
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ID: 4742591 pcs
thumb image of 14.8ct Oval Cabochon Golden-Brown Star Sunstone (ID: 474259)
14.79 ct Star Sunstone
17.7 x 14.3 mm
$ 31.06
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ID: 4708381 pcs
thumb image of 5.4ct Oval Cabochon Grayish Silver Star Sapphire (ID: 470838)
5.41 ct Star Sapphire
9.5 x 8.4 mm
$ 189.35
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ID: 4711781 pcs
thumb image of 5.2ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471178)
5.23 ct Star Sunstone
12.9 x 11.1 mm
$ 10.46
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ID: 4732891 pcs
thumb image of 4.1ct Oval Cabochon Purplish Red Star Ruby (ID: 473289)
4.13 ct Star Ruby
9.6 x 7.5 mm
$ 45.43
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ID: 4797251 pcs
thumb image of 1.7ct Oval Cabochon Black Star Diopside (ID: 479725)
1.74 ct Star Diopside
8.1 x 6.1 mm
$ 2.61
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ID: 4712151 pcs
thumb image of 8.3ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471215)
8.25 ct Star Sunstone
13.6 x 11.3 mm
$ 38.20
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ID: 4705641 pcs
thumb image of 2ct Oval Cabochon Purplish Red Star Ruby (ID: 470564)
2.03 ct Star Ruby
8.4 x 7 mm
$ 22.33
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ID: 4786591 pcs
thumb image of 2.5ct Oval Cabochon Blue Star Sapphire (ID: 478659)
2.54 ct Star Sapphire
9.3 x 6.9 mm
$ 50.80
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ID: 4711841 pcs
thumb image of 4.3ct Oval Cabochon Golden-Brown Star Sunstone (ID: 471184)
4.34 ct Star Sunstone
11.3 x 9.3 mm
$ 8.68
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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