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Buy Star Gemstones

(1513)
Gemtype Weight Size Clarity Price Origin
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Deep Navy Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 489855)

Oval Blue Star Sapphire

1.09 ct (total 4.34ctw)
7.1 x 5.2 mm
$ 86.80
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4 pcs
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Twilight Blue Star Sapphire Gem - 1.3ct Oval Cabochon (ID: 483579)

Oval Blue Star Sapphire

1.25 ct (total 5.01ctw)
7.1 x 5.2 mm
$ 100.20
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1 pc
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Black Star Sapphire Gem - 4.1ct Oval Cabochon (ID: 470223)

Oval Black Star Sapphire

4.1ct
10.6 x 8 mm
$ 82.80
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1 pc
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Black Star Diopside Gem - 3.3ct Pear Cabochon (ID: 480597)

Pear Black Star Diopside

3.3ct
10.1 x 7.1 mm
$ 4.89
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1 pc
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Click for Product Video (522544)
Golden Yellow Star Sapphire Gem - 46.1ct Oval Cabochon (ID: 522544)

Oval Golden Star Sapphire

46.1ct
23.2 x 19.7 mm
$ 414.54
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1 pc
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Orangish Gold Star Sapphire Gem - 15ct Oval Cabochon (ID: 522549)

Oval Golden Star Sapphire

15ct
14.2 x 11.7 mm
$ 135.27
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Orangish Gold Star Sapphire Gem - 32ct Oval Cabochon (ID: 523185)

Oval Golden Star Sapphire

32ct
19.8 x 16.9 mm
$ 287.55
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4 pcs
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Black Star Diopside Gem - 1.8ct Oval Cabochon (ID: 499274)

Oval Black Star Diopside

1.81 ct (total 7.24ctw)
7.9 x 6 mm
$ 11.37
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Dark Red Star Garnet Gem - 49.7ct Round Cabochon (ID: 403886)

Round Red Star Garnet

49.7ct
24.1 mm
$ 149.07
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1 pc
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Warm White Star Moonstone Gem - 6.8ct Oval Cabochon (ID: 418087)

Oval White Star Moonstone

6.8ct
15.3 x 10.6 mm
$ 27.36
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1 pc
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Black Star Sapphire Gem - 2.2ct Oval Cabochon (ID: 487172)

Oval Black Star Sapphire

2.2ct
8.3 x 6.4 mm
$ 21.70
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4 pcs
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Deep Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 490226)

Oval Blue Star Sapphire

1.14 ct (total 4.57ctw)
7.1 x 5.2 mm
$ 82.26
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Medium-Dark Purple Star Ruby Gem - 13.4ct Oval Cabochon (ID: 521334)

Oval Purple Star Ruby

13.4ct
13.3 x 11.5 mm
$ 160.44
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Dark Red Star Ruby Gem - 10.6ct Oval Cabochon (ID: 520876)

Oval Red Star Ruby

10.6ct
12.8 x 10.4 mm
$ 127.68
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Black Star Diopside Gem - 4ct Round Cabochon (ID: 515585)

Round Black Star Diopside

4ct
9.1 mm
$ 7.92
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Black Star Sapphire Gem - 2.9ct Oval Cabochon (ID: 486882)

Oval Black Star Sapphire

2.9ct
8.8 x 6.6 mm
$ 28.70
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1 pc
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Golden Yellow Star Sapphire Gem - 33.4ct Oval Cabochon (ID: 522803)

Oval Golden Star Sapphire

33.4ct
19.2 x 16.6 mm
$ 300.78
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4 pcs
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Deep Blue Star Sapphire Gem - 1ct Oval Cabochon (ID: 490233)

Oval Blue Star Sapphire

0.98 ct (total 3.91ctw)
6.9 x 5.2 mm
$ 70.38
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Dark Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 490183)

Oval Blue Star Sapphire

1.10 ct (total 4.38ctw)
7 x 5.2 mm
$ 78.84
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2 pcs
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Black Star Sapphire Gem - 0.9ct Oval Cabochon (ID: 538319)

Oval Black Star Sapphire

0.91 ct (total 1.81ctw)
6.8 x 5 mm
$ 18.10
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Tangerine Star Moonstone Gem - 5ct Oval Cabochon (ID: 418553)

Oval Golden Star Moonstone

5ct
13.1 x 8.2 mm
$ 19.80
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
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This web site is super easy to use and the product has always been top notch. I have ordered stones from around the globe and I love their selection. My wife's wedding gifts and greats birthday gifts always start with gem select.
Posted By Jake the Jeweler in September, 2019
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Overall Rating -> 10 star ratings
I really trust GemSelect from the recommendation from MsBlue at The Remix and going to the site you can see where the Crystal is from geographically and basic scientific properties and I see the exact Crystal I am buying from the pictur. No surprises and you are getting the REAL THING!
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I always show off my gems and jewlery...I always show people the site and gems...I love the mineral rocks and stones..
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Overall Rating -> 10 star ratings
I love the quality and prices of the large gemstones.
Posted By Tom in September, 2019
Source: Bizrate
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All Gemstones (142)
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
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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