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Buy Star Gemstones

(1513)
Gem Type Weight Size Clarity Price Origin
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Pinkish Purple Star Ruby Gem - 5.3ct Oval Cabochon (ID: 542743)

Oval Purple Star Ruby

5.3ct
8.9 x 8.5 mm
$ 52.80
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1 pc
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Cantaloupe Orange Star Moonstone Gem - 14.5ct Oval Cabochon (ID: 418363)

Oval Orange Star Moonstone

14.5ct
15.8 x 13.7 mm
$ 57.88
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20 pcs
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Raspberry Red Star Ruby Gem - 3.6ct Oval Cabochon (ID: 521727)

1 pc (avg. 3.64 ct) Purple Star Ruby

9.2 x 7.7 mm
$ 54.56
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Light Yellow Star Moonstone Gem - 10.4ct Oval Cabochon (ID: 416501)

Oval Yellow Star Moonstone

10.4ct
14.1 x 12.2 mm
$ 41.72
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10 pcs
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Raspberry Red Star Ruby Gem - 3.5ct Oval Cabochon (ID: 521726)

1 pc (avg. 3.48 ct) Purple Star Ruby

8.6 x 7.4 mm
$ 52.24
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Medium Pink Star Rose Quartz Gem - 236.3ct Oval Cabochon (ID: 344438)

Oval Pink Star Rose Quartz

236.3ct
38.2 x 36.2 mm
$ 590.75
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Mahogany Red Star Garnet Gem - 91.1ct Oval Cabochon (ID: 404006)

Oval Red Star Garnet

91.1ct
28.4 x 24.1 mm
$ 273.15
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Warm Yellow Star Sapphire Gem - 28.3ct Oval Cabochon (ID: 522538)

Oval Yellow Star Sapphire

28.3ct
18 x 15.1 mm
$ 254.61
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Light Grey Star Sapphire Gem - 10.7ct Oval Cabochon (ID: 470842)

Oval Gray Star Sapphire

10.7ct
11.7 x 11.1 mm
$ 374.15
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Light Grey Star Sapphire Gem - 21.2ct Round Cabochon (ID: 470844)

Round Gray Star Sapphire

21.2ct
14.7 mm
$ 743.05
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Black Star Diopside Gem - 4.3ct Round Cabochon (ID: 515591)

Round Black Star Diopside

4.3ct
9.1 mm
$ 8.64
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Dark Red Star Garnet Gem - 92.7ct Oval Cabochon (ID: 404007)

Oval Red Star Garnet

92.7ct
29.1 x 24 mm
$ 278.04
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Very Light Grey Star Sapphire Gem - 9.4ct Round Cabochon (ID: 470803)

Round Gray Star Sapphire

9.4ct
11.2 mm
$ 328.65
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Reddish Purple Star Ruby Gem - 127.7ct Oval Cabochon (ID: 513651)

Oval Purple Star Ruby

127.7ct
28.2 x 25.8 mm
$ 1,915.20
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Medium-Dark Orange Star Moonstone Gem - 10.6ct Oval Cabochon (ID: 418369)

Oval Orange Star Moonstone

10.6ct
14.9 x 12.2 mm
$ 42.48
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67 pcs
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Dark Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 503790)

1 pc (avg. 1.05 ct) Blue Star Sapphire

7.2 x 5.2 mm
$ 20.94
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Dark Red Star Garnet Gem - 102.6ct Round Cabochon (ID: 404010)

Round Red Star Garnet

102.6ct
26.5 mm
$ 307.71
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Medium Yellow Star Sapphire Gem - 48.3ct Oval Cabochon (ID: 522542)

Oval Yellow Star Sapphire

48.3ct
21.8 x 18.3 mm
$ 434.61
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Golden Yellow Star Sapphire Gem - 14.4ct Oval Cabochon (ID: 522548)

Oval Golden Star Sapphire

14.4ct
15 x 12.2 mm
$ 129.24
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Raspberry Red Star Ruby Gem - 6.3ct Pear Cabochon (ID: 527417)

Pear Purple Star Ruby

6.3ct
10.4 x 9.7 mm
$ 62.50
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Light Yellow Star Moonstone Gem - 12.5ct Oval Cabochon (ID: 484388)

Oval Yellow Star Moonstone

12.5ct
15.3 x 13.2 mm
$ 50.04
Item in Stock
Star Gemstones

Why buy 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.

What are some of the properties of Star Gemstones?

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.

What are good ways to use Star Gemstones?

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 shape and orient the stones correctly. For these reasons, it is best to display star gemstones under intense light or in direct-light when wearing them.

Want to know more about Star Gemstones?

Read our Star Gemstones Information Page here.

Certified Customer Reviews
Overall Rating -> 10 star ratings
This is my second time purchasing from Gem Select. I love this vendor and the website Full of info and if there’s any problems or questions customer service has been stellar at Making the experience a great one.
Posted By Tmpbjur in February, 2020
Source: Bizrate
Overall Rating -> 8 star ratings
seems like a good place to purchase a gem
Posted By Jane in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
First, I wanted to say that you guys have a great selection gems, in all price ranges! Awesome site!! My son found a 6 piece set of blue topaz hearts that he wanted to get. I wanted to view all of the 6 piece sets or 10 piece sets. I recommend adding that ability to your filter.
Posted By Mike in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Everything came in as expected. This was a great experience and I will order from here again.
Posted By Sam in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
It was great! They have a great selection of products for great prices. I found even more than I could've possibly wanted.
Posted By AveryN in February, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I have been ordering from GemSelect for almost a decade and every single item I have ever ordered arrived in perfect condition - and each of them was exactly as advertised! I have told my friends and encouraged them to shop there also. It is a pleasure to shop this site!
Posted By Jim in February, 2020
Source: Bizrate
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More Shapes
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  • Pear Cabochon
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  • Square / Scissor Cut
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Popular Gemstones
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All Gemstones (144)
A B C D E F G H I J K L M N O P Q R S T V Z
  • Actinolite Cat's Eye
  • Agate
  • Agate Geode
  • Almandine Garnet
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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