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Buy Star Gemstones

(1363)
Gem Type Weight Size Clarity Price Origin
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Medium Grey Star Sapphire Gem - 13.5ct Oval Cabochon (ID: 470809)

Oval Gray Star Sapphire

13.5ct
13.7 x 11.6 mm
$ 471.10
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6 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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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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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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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
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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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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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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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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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Medium Purple Star Ruby Gem - 59.8ct Oval Cabochon (ID: 523618)

Oval Purple Star Ruby

59.8ct
22.7 x 21.3 mm
$ 1,195.60
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Black Star Sapphire Gem - 20.3ct Oval Cabochon (ID: 350892)

Oval Black Star Sapphire

20.3ct
19.2 x 15.9 mm
$ 553.92
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Orangish Gold Star Sapphire Gem - 141ct Oval Cabochon (ID: 523193)

Oval Golden Star Sapphire

141ct
32.1 x 27.2 mm
$ 1,269.00
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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 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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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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47 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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14 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 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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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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Click for Product Video (470800)
Light Grey Star Sapphire Gem - 11ct Round Cabochon (ID: 470800)

Round Gray Star Sapphire

11ct
11.5 mm
$ 383.95
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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
Item in Stock

About 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
When I could not find a good matched pair, Customer Service (Thomas Dahlberg) responded with a selection of beautiful singles, which I also needed, and I found just the right stone for my ring. This means he actually read my email! So unusual these days. So very welcome.
Posted By Miramar in July, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Excellent! I only shop with GemSelect. My wife thanks you!
Posted By LesterHammond in July, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
The sight has a great selection of stones at a variety of price points. It was easy for me to find affordable stones for gem identification practice as well as some fun pieces for my collection. Very happy with GemSelect!
Posted By Mary in July, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I love GemSelect, they've always been my source for gemstones for any reason. I wouldn't bother even looking anywhere else.
Posted By Zutono in July, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Very good I like alot
Posted By Superfllipino in July, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I wanted to purchase gems associated with chakras
Posted By MrRich15 in July, 2020
Source: Bizrate
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Total Number of Articles: 1313

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All Gemstones (143)
A B C D E F G H I J K L M N O P Q R S T V Z
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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