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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (1230): 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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17.8ct Oval Cabochon Cream Star Moonstone Gem (ID: 417030)
17.80 ct Star Moonstone
17.7 x 14.8 mm
$ 71.20
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21.2ct Round Cabochon Grayish Silver Star Sapphire Gem (ID: 470844)
21.23 ct Star Sapphire
14.7 mm
$ 743.05
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1.6ct Oval Cabochon Black Star Sapphire Gem (ID: 486770)
1.57 ct Star Sapphire
8.3 x 6.2 mm
$ 15.70
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17.3ct Oval Cabochon Cream Star Moonstone Gem (ID: 325814)
17.25 ct Star Moonstone
17.9 x 14 mm
$ 69.00
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8ct Oval Cabochon Cream Star Moonstone Gem (ID: 490450)
8.02 ct Star Moonstone
14.5 x 12.4 mm
$ 16.04
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32.7ct Oval Cabochon Black Star Sapphire Gem (ID: 350640)
32.74 ct Star Sapphire
19.4 x 16.4 mm
$ 655.75
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1.7ct Oval Cabochon Black Star Sapphire Gem (ID: 486772)
1.68 ct Star Sapphire
8.2 x 6.3 mm
$ 16.80
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15.9ct Oval Cabochon Orange Cream Star Moonstone Gem (ID: 262109)
15.93 ct Star Moonstone
14.2 x 13.4 mm
$ 63.72
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81.2ct Round Cabochon Lemon Star Lemon Quartz Gem (ID: 497513)
81.22 ct Star Lemon Quartz
23.3 mm
$ 243.66
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8.2ct Oval Cabochon Cream Star Moonstone Gem (ID: 490444)
8.23 ct Star Moonstone
13 x 10.7 mm
$ 16.46
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2.7ct Oval Cabochon Black Star Sapphire Gem (ID: 488163)
2.73 ct Star Sapphire
8.2 x 6.7 mm
$ 27.30
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7.8ct Oval Cabochon Purplish Red Star Ruby Gem (ID: 468605)
7.81 ct Star Ruby
12.3 x 10 mm
$ 62.48
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84.6ct Oval Cabochon Lemon Star Lemon Quartz Gem (ID: 373452)
84.63 ct Star Lemon Quartz
25.2 x 22.5 mm
$ 253.89
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4.2ct Round Cabochon Purplish Red Star Ruby Gem (ID: 468547)
4.21 ct Star Ruby
8.8 mm
$ 46.31
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15.3ct Oval Cabochon Cream Star Moonstone Gem (ID: 418543)
15.31 ct Star Moonstone
19.2 x 14 mm
$ 61.24
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8.4ct Oval Cabochon Smoke Star Moonstone Gem (ID: 490443)
8.42 ct Star Moonstone
13.3 x 12.3 mm
$ 16.84
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20.3ct Oval Cabochon Black Star Sapphire Gem (ID: 350892)
20.32 ct Star Sapphire
19.2 x 15.9 mm
$ 553.92
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5.8ct Oval Cabochon Purplish Red Star Ruby Gem (ID: 473591)
5.79 ct Star Ruby
9.3 x 8.5 mm
$ 63.69
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6.7ct Oval Cabochon Cream Star Moonstone Gem (ID: 418943)
6.74 ct Star Moonstone
14.6 x 9.7 mm
$ 26.96
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1.7ct Oval Cabochon Black Star Sapphire Gem (ID: 488737)
1.69 ct Star Sapphire
8.7 x 6.1 mm
$ 16.90
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1.3ct Oval Cabochon Blue Star Sapphire Gem (ID: 483278)
1.28 ct (total 2.56ctw) Star Sapphire
7.2 x 5.3 mm
$ 51.20
Item in Stock
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.
Certified Customer Reviews
Overall Rating -> 10 star ratings
Easy to see the gemstones you are buying, easy to see prices and shipping.
Posted By Amy in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have been using GemSelect for at lest five years and I have no complaints!
Posted By in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
This site always has beautiful stones to choose from and you will get the actual gem that is pictured. The shipping is fast and reasonably priced.
Posted By CAC in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I have not gotten my gems, but when i do i will be very happy, yet i did not like you had to pay $15 extra for faster shipping
Posted By Jack in October, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect, personally. I browse their site almost daily to see all the new stones available. Their selection is pretty amazing. The quality isn't always the highest and the cut of the stones isn't always perfect. But for the price, and if you look hard enough, you can find a real gem, so to speak.
Posted By Patrick in September, 2018
Source: Bizrate
Overall Rating -> 10 star ratings
I would recommend to a friend because of the quality of the products purchased. The gemstone quality is very high and the gems purchased are beautiful. Any friends interested in having custom jewelry made would definitely be recommended to the site. Also, every shipment is handled with care and I am very pleased with that.
Posted By Isaiah in September, 2018
Source: Bizrate
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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