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Buy Star Gemstones

(1067)
Gem Type Weight Size Clarity Price Origin
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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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19 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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1 pc
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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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1 pc
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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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1 pc
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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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4 pcs
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Deep Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 490174)

Oval Blue Star Sapphire

1.10 ct (total 4.39ctw)
7 x 5.1 mm
$ 79.02
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1 pc
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Light Yellow Star Moonstone Gem - 5.2ct Oval Cabochon (ID: 418379)

Oval Yellow Star Moonstone

5.2ct
12.6 x 10.2 mm
$ 20.84
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1 pc
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Golden Yellow Star Sapphire Gem - 30ct Oval Cabochon (ID: 522801)

Oval Golden Star Sapphire

30ct
18.5 x 15.5 mm
$ 270.09
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1 pc
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Medium Pink Star Ruby Gem - 7.6ct Oval Cabochon (ID: 520675)

Oval Pink Star Ruby

7.6ct
11.3 x 9.7 mm
$ 90.84
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1 pc
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Black Star Diopside Gem - 2.9ct Baguette Cabochon (ID: 551923)

Baguette Black Star Diopside

2.9ct
7.7 x 5.7 mm
$ 8.58
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1 pc
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Rapberry Red Star Ruby Gem - 12ct Oval Cabochon (ID: 521341)

Oval Purple Star Ruby

12ct
14.7 x 12.8 mm
$ 144.00
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1 pc
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Medium-Dark Purple Star Ruby Gem - 12.5ct Oval Cabochon (ID: 521342)

Oval Purple Star Ruby

12.5ct
13.1 x 10.7 mm
$ 150.36
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1 pc
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Medium-Light Brown Star Moonstone Gem - 7.9ct Oval Cabochon (ID: 418657)

Oval Brown Star Moonstone

7.9ct
13.8 x 11.4 mm
$ 31.56
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1 pc
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Medium-Dark Purple Star Ruby Gem - 15ct Oval Cabochon (ID: 522083)

Oval Purple Star Ruby

15ct
16.2 x 13.4 mm
$ 180.00
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1 pc
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Medium-Dark Purple Star Ruby Gem - 5.1ct Oval Cabochon (ID: 528179)

Oval Purple Star Ruby

5.1ct
10.3 x 9.4 mm
$ 61.68
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1 pc
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Navy Blue Star Sapphire Gem - 1ct Oval Cabochon (ID: 490349)

Oval Blue Star Sapphire

1ct
7 x 4.9 mm
$ 23.94
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1 pc
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Grayish Magenta Star Ruby Gem - 5.9ct Oval Cabochon (ID: 525320)

Oval Purple Star Ruby

5.9ct
11.8 x 9.7 mm
$ 70.68
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1 pc
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Black Star Diopside Gem - 3.5ct Round Cabochon (ID: 501767)

Round Black Star Diopside

3.5ct
9 mm
$ 7.04
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1 pc
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Black Star Sapphire Gem - 2.1ct Oval Cabochon (ID: 488647)

Oval Black Star Sapphire

2.1ct
9.1 x 6.7 mm
$ 20.90
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1 pc
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Black Star Diopside Gem - 4.2ct Round Cabochon (ID: 501765)

Round Black Star Diopside

4.2ct
9 mm
$ 8.38
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2 pcs
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Black Star Diopside Gem - 2ct Oval Cabochon (ID: 479180)

Oval Black Star Diopside

2.01 ct (total 4.01ctw)
9 x 6.8 mm
$ 6.02
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 -> 9 star ratings
Lots of options!
Posted By Bruhh in March, 2021
Source: Bizrate
Overall Rating -> 8 star ratings
I enjoy shopping for merchandise that I can bid on or buy direct.
Posted By Danny in March, 2021
Source: Bizrate
Overall Rating -> 10 star ratings
The process was easy and made finding what I wanted effortless!
Posted By Ivy in March, 2021
Source: Bizrate
Overall Rating -> 10 star ratings
The selection of gems they had are great and the prices are fair. It is easy to purchase.
Posted By Mmorric in March, 2021
Source: Bizrate
Overall Rating -> 10 star ratings
All good
Posted By Brandyn in March, 2021
Source: Bizrate
Overall Rating -> 8 star ratings
I’m excited about the stone, hoping it’s beautiful in real life. We’ll see when I get it, if it’s great I’ll buy more from this company
Posted By Brooker in March, 2021
Source: Bizrate
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Total Number of Articles: 1453

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All Gemstones (141)
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