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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (21): 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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Grayish Silver Star Sapphire Gem - 11ct Round Cabochon (ID: 470800)

Round Gray Star Sapphire

11ct
11.5 mm
$ 383.95
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Grayish Silver 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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Grayish Silver Star Sapphire Gem - 21.2ct Round Cabochon (ID: 470844)

Round Gray Star Sapphire

21.2ct
14.7 mm
$ 743.05
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Smoke Star Moonstone Gem - 8.4ct Oval Cabochon (ID: 490443)

Oval Gray Star Moonstone

8.4ct
13.3 x 12.3 mm
$ 16.84
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Grayish Silver Star Sapphire Gem - 14.4ct Oval Cabochon (ID: 470808)

Oval Gray Star Sapphire

14.4ct
13.5 x 12.3 mm
$ 503.65
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Grayish Silver Star Sapphire Gem - 7.1ct Oval Cabochon (ID: 470846)

Oval Gray Star Sapphire

7.1ct
7.6 x 8.6 mm
$ 247.10
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Grayish Silver 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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Grayish Silver Star Sapphire Gem - 12.1ct Oval Cabochon (ID: 470845)

Oval Gray Star Sapphire

12.1ct
12.3 x 11.4 mm
$ 424.20
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Grayish Silver Star Sapphire Gem - 5.3ct Oval Cabochon (ID: 470811)

Oval Gray Star Sapphire

5.3ct
9.6 x 9.1 mm
$ 186.55
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Grayish Silver Star Sapphire Gem - 8.8ct Round Cabochon (ID: 470802)

Round Gray Star Sapphire

8.8ct
10.6 mm
$ 308.00
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Grayish Silver Star Sapphire Gem - 6.6ct Oval Cabochon (ID: 470806)

Oval Gray Star Sapphire

6.6ct
10.2 x 9.7 mm
$ 231.35
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Grayish Silver Star Sapphire Gem - 9.4ct Round Cabochon (ID: 470803)

Round Gray Star Sapphire

9.4ct
11.2 mm
$ 328.65
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Grayish Silver Star Sapphire Gem - 4.5ct Oval Cabochon (ID: 470843)

Oval Gray Star Sapphire

4.5ct
8.6 x 8 mm
$ 157.50
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Grayish Silver Star Sapphire Gem - 9.4ct Oval Cabochon (ID: 470837)

Oval Gray Star Sapphire

9.4ct
11.1 x 10.1 mm
$ 328.65
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Grayish Silver Star Sapphire Gem - 5.5ct Oval Cabochon (ID: 501413)

Oval Gray Star Sapphire

5.5ct
9.5 x 8.5 mm
$ 193.20
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Grayish Silver Star Sapphire Gem - 5.7ct Oval Cabochon (ID: 470807)

Oval Gray Star Sapphire

5.7ct
11.4 x 9.8 mm
$ 198.45
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Grayish Silver Star Sapphire Gem - 5.4ct Oval Cabochon (ID: 491152)

Oval Gray Star Sapphire

5.4ct
9.5 x 8.3 mm
$ 189.35
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Grayish Silver Star Sapphire Gem - 5.4ct Oval Cabochon (ID: 470839)

Oval Gray Star Sapphire

5.4ct
9.5 x 9.1 mm
$ 187.25
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Grayish Silver Star Sapphire Gem - 9ct Round Cabochon (ID: 470805)

Round Gray Star Sapphire

9ct
10.5 mm
$ 313.60
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Grayish Silver Star Sapphire Gem - 7.9ct Oval Cabochon (ID: 470841)

Oval Gray Star Sapphire

7.9ct
10.6 x 10.2 mm
$ 275.80
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Grayish Silver Star Sapphire Gem - 9.3ct Round Cabochon (ID: 470801)

Round Gray Star Sapphire

9.3ct
11.7 mm
$ 324.80
Item in Stock
1
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
My experience with gemselect was awesome so far. I had a few questions about their website and making orders and they replied quickly and were happy to help. I have not received the items I ordered yet as I just ordered them this morning. Although, I truly feel I am going to be a very happy customer once I do receive my items. Gemselect guarantees all their items and have a great return policy just incase. The have a vast selection of all kinds of stones and not to mention their prices are much better than some other websites. Thanks Gemselect I’ll be doing business here from now on!
Posted By Jpapaleo in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I was very happy on the quality of the gemstones I recieved from GemSelect, I will deffinetly buy again.
Posted By Mckeg in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great, easy to use, efficient!
Posted By Olive in January, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Great selection. Love the many learning features like articles and gem information. Prices competitive for natural stones. I do miss not having a selection of lab-made stones, CZ’s, etc, which are useful when price and cost are factors.
Posted By Dirk in January, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Website easy to navigate.
Posted By RaeRae in January, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
I WOULD RECOMMEND GEM SELECT.
Posted By BO in January, 2019
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