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Gemtype Color Shape Weight Size Clarity Price Origin
You Selected (1130): 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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Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 489677)

Oval Blue Star Sapphire

1.16 ct (total 4.64ctw)
7 x 5.1 mm
$ 92.80
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4 pcs
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Blue Star Sapphire Gem - 1.4ct Oval Cabochon (ID: 490208)

Oval Blue Star Sapphire

1.41 ct (total 5.63ctw)
7.1 x 5.2 mm
$ 101.34
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1 pc
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Black Star Sapphire Gem - 2.6ct Oval Cabochon (ID: 498781)

Oval Black Star Sapphire

2.6ct
9.4 x 7.1 mm
$ 26.00
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1 pc
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Blue Star Sapphire Gem - 3ct Oval Cabochon (ID: 478660)

Oval Blue Star Sapphire

3ct
9.4 x 7.4 mm
$ 60.80
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4 pcs
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Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 490246)

Oval Blue Star Sapphire

1.15 ct (total 4.58ctw)
6.8 x 4.9 mm
$ 82.44
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1 pc
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Blue Star Sapphire Gem - 1.4ct Oval Cabochon (ID: 483699)

Oval Blue Star Sapphire

1.4ct
7.2 x 5.3 mm
$ 27.80
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1 pc
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Black Star Sapphire Gem - 5ct Oval Cabochon (ID: 498755)

Oval Black Star Sapphire

5ct
9.9 x 8 mm
$ 50.40
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1 pc
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Black Star Sapphire Gem - 2.4ct Oval Cabochon (ID: 488645)

Oval Black Star Sapphire

2.4ct
8.7 x 6.3 mm
$ 24.10
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2 pcs
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Black Star Sapphire Gem - 1.9ct Oval Cabochon (ID: 488345)

Oval Black Star Sapphire

1.91 ct (total 3.82ctw)
8.2 x 6.5 mm
$ 38.20
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4 pcs
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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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4 pcs
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Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 489818)

Oval Blue Star Sapphire

1.19 ct (total 4.77ctw)
7.1 x 5.2 mm
$ 95.40
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Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 483727)

Oval Blue Star Sapphire

1.12 ct (total 4.47ctw)
6.8 x 5.1 mm
$ 89.40
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Blue Star Sapphire Gem - 1ct Oval Cabochon (ID: 490178)

Oval Blue Star Sapphire

1.02 ct (total 4.08ctw)
7 x 5.2 mm
$ 73.44
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4 pcs
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Blue Star Sapphire Gem - 1.4ct Oval Cabochon (ID: 490228)

Oval Blue Star Sapphire

1.40 ct (total 5.60ctw)
7.1 x 5.2 mm
$ 100.80
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1 pc
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Black Star Sapphire Gem - 2.6ct Oval Cabochon (ID: 488165)

Oval Black Star Sapphire

2.6ct
9 x 6.9 mm
$ 26.10
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2 pcs
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Black Star Sapphire Gem - 1.9ct Oval Cabochon (ID: 488348)

Oval Black Star Sapphire

1.93 ct (total 3.85ctw)
8 x 6.2 mm
$ 38.50
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1 pc
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Blue Star Sapphire Gem - 1.8ct Oval Cabochon (ID: 490357)

Oval Blue Star Sapphire

1.8ct
7.1 x 5.2 mm
$ 32.94
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2 pcs
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Blue Star Sapphire Gem - 2ct Oval Cabochon (ID: 478646)

Oval Blue Star Sapphire

2.02 ct (total 4.03ctw)
9.4 x 7.5 mm
$ 80.60
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4 pcs
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Blue Star Sapphire Gem - 1ct Oval Cabochon (ID: 490131)

Oval Blue Star Sapphire

0.97 ct (total 3.86ctw)
6.8 x 5.1 mm
$ 69.48
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4 pcs
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Blue Star Sapphire Gem - 0.7ct Oval Cabochon (ID: 490128)

Oval Blue Star Sapphire

0.68 ct (total 2.70ctw)
6.8 x 5 mm
$ 48.60
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3 pcs
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Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 490151)

Oval Blue Star Sapphire

1.13 ct (total 3.39ctw)
6.9 x 4.9 mm
$ 61.02
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 -> 10 star ratings
man their gems are pretty good, and the prices aren't to bad either, I like checking out hte gems on there website, beceause the pictures of the gems are taken pretty well, and you can see the table, and the facets.
Posted By Spinach in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I love gemselect and I have bought a fair amount from them. The only complaint I have is not being able to save gems. I have a lot of projects so i am in the market for a lot of different gems and it's so disappointing to have to delete them all just to purchase one or two that I have saved in my cart.
Posted By S.Hicks in March, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I always check this site because they have unique options.
Posted By Lisa in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Great website to navigate. Awesome Gem selection! Nice photos and discriptions for all of the gems for sale. You can find gems in all price ranges. Checkout was a breeze.
Posted By Timmy in February, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
They had an extensive gemstone selection in all different cuts, sizes, and colors. They also had very good and workable prices. All of these aspects pulled me in as a customer.
Posted By Josh in February, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
It all depend on the product I will receive and have it verified by my in law jewellers.
Posted By Vodka in February, 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