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Buy Star Gemstones

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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (1124): 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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Pink Star Rose Quartz Gem - 34.4ct Oval Cabochon (ID: 491975)

Oval Pink Star Rose Quartz

34.4ct
22.6 x 16.4 mm
$ 68.44
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4 pcs
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Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 490177)

Oval Blue Star Sapphire

1.20 ct (total 4.78ctw)
7 x 5.2 mm
$ 86.04
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2 pcs
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Black Star Diopside Gem - 4.9ct Round Cabochon (ID: 502186)

Round Black Star Diopside

4.90 ct (total 9.80ctw)
9.1 mm
$ 19.60
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1 pc
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Black Star Sapphire Gem - 4.3ct Oval Cabochon (ID: 470379)

Oval Black Star Sapphire

4.3ct
10.8 x 8.8 mm
$ 86.40
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1 pc
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Pink Star Rose Quartz Gem - 383ct Oval Cabochon (ID: 354763)

Oval Pink Star Rose Quartz

383ct
44.4 x 42.5 mm
$ 765.90
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1 pc
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Light Yellow Star Moonstone Gem - 7.3ct Round Cabochon (ID: 497321)

Round Yellow Star Moonstone

7.3ct
11.1 mm
$ 29.28
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2 pcs
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Black Star Diopside Gem - 5.1ct Round Cabochon (ID: 502620)

Round Black Star Diopside

5.05 ct (total 10.09ctw)
9.1 mm
$ 20.18
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1 pc
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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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1 pc
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Black Star Diopside Gem - 2.1ct Baguette Cabochon (ID: 480603)

Baguette Black Star Diopside

2.1ct
7.1 x 5.3 mm
$ 3.12
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1 pc
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Black Red Star Garnet Gem - 93.5ct Oval Cabochon (ID: 404009)

Oval Red Star Garnet

93.5ct
29.4 x 24.3 mm
$ 280.59
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89 pcs
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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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2 pcs
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Black Star Diopside Gem - 5.3ct Oval Cabochon (ID: 503779)

Oval Black Star Diopside

5.31 ct (total 10.62ctw)
11.2 x 9 mm
$ 11.26
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2 pcs
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Blue Star Sapphire Gem - 4.2ct Oval Cabochon (ID: 478657)

Oval Blue Star Sapphire

4.19 ct (total 8.38ctw)
9.8 x 7.8 mm
$ 167.60
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1 pc
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Pink Star Rose Quartz Gem - 105.3ct Oval Cabochon (ID: 344439)

Oval Pink Star Rose Quartz

105.3ct
30.4 x 26.1 mm
$ 264.50
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1 pc
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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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2 pcs
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Black Star Diopside Gem - 3.8ct Round Cabochon (ID: 502619)

Round Black Star Diopside

3.75 ct (total 7.50ctw)
9.1 mm
$ 15.00
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1 pc
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Cream Star Moonstone Gem - 10.1ct Oval Cabochon (ID: 416875)

Oval Cream Star Moonstone

10.1ct
14.7 x 9.6 mm
$ 40.36
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1 pc
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Cream Star Moonstone Gem - 10.5ct Oval Cabochon (ID: 418361)

Oval Cream Star Moonstone

10.5ct
14.6 x 10.8 mm
$ 42.12
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1 pc
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Cream Star Moonstone Gem - 8.6ct Oval Cabochon (ID: 497317)

Oval Cream Star Moonstone

8.6ct
13.1 x 11.2 mm
$ 34.36
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6 pcs
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Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 490153)

Oval Blue Star Sapphire

1.12 ct (total 6.70ctw)
7.1 x 5.1 mm
$ 120.60
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1 pc
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Black Red Star Garnet Gem - 92.7ct Oval Cabochon (ID: 404007)

Oval Red Star Garnet

92.7ct
29.1 x 24 mm
$ 278.04
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 -> 9 star ratings
Easy to shop through gemselect and will look there for future purchases.
Posted By Childcapo in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
good value
Posted By Don in February, 2019
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Overall Rating -> 10 star ratings
It was super easy to browse all the gemstones and find exactly what you wanted. The prices were great and the checkout process was smooth. Seems like a great site, will definitely come back to find more in the future.
Posted By JMWatch Guy in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
Ive always been pleased with quality and truth of gems rating I am a gemmologist and really like the descriptions as well . i.e cut, colour and quality Sometimes Ill choose GemSelect rather than a local wholesaler because of my regard for their quality and truth
Posted By Mango in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
I will continue to utilize gemselect in my business as a jeweler.
Posted By Julie in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Very good selection, easy to navigate site and very reasonable prices. I look forward to receiving the gems and if they are everything they appeared to be I will be extremely happy. Definitely likely to purchase from this site again.
Posted By Anthony 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