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Buy Star Gemstones

(1347)
Gem Type Weight Size Clarity Price Origin
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Black Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 538112)

Oval Black Star Sapphire

1.1ct
6.5 x 5.2 mm
$ 10.50
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1 pc
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Medium-Dark Purple Star Ruby Gem - 5.6ct Oval Cabochon (ID: 525652)

Oval Purple Star Ruby

5.6ct
10.8 x 9 mm
$ 67.44
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4 pcs
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Black Star Diopside Gem - 2.2ct Oval Cabochon (ID: 499273)

Oval Black Star Diopside

2.21 ct (total 8.82ctw)
8.1 x 6.1 mm
$ 13.85
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1 pc
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Orangish Gold Star Sapphire Gem - 32.9ct Oval Cabochon (ID: 522539)

Oval Golden Star Sapphire

32.9ct
21.4 x 18.5 mm
$ 295.83
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Raspberry Red Star Ruby Gem - 4.8ct Oval Cabochon (ID: 528183)

Oval Purple Star Ruby

4.8ct
10.4 x 9.7 mm
$ 57.12
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4 pcs
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Deep Navy Blue Star Sapphire Gem - 0.9ct Oval Cabochon (ID: 489828)

Oval Blue Star Sapphire

0.85 ct (total 3.39ctw)
7 x 5.1 mm
$ 67.80
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Black Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 537934)

Oval Black Star Sapphire

1.2ct
6.8 x 5.1 mm
$ 11.60
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1 pc
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Dark Blue Star Sapphire Gem - 0.8ct Oval Cabochon (ID: 557788)

Oval Blue Star Sapphire

0.8ct
6.8 x 5 mm
$ 16.80
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4 pcs
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Dark Blue Star Sapphire Gem - 1.1ct Oval Cabochon (ID: 483750)

Oval Blue Star Sapphire

1.12 ct (total 4.49ctw)
6.8 x 5.1 mm
$ 89.80
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Mahogany Red Star Garnet Gem - 9.2ct Oval Cabochon (ID: 574638)

Oval Red Star Garnet

9.2ct
13.2 x 10.3 mm
$ 9.15
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Twilight Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 517301)

Oval Blue Star Sapphire

1.2ct
7.1 x 5.2 mm
$ 21.85
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Plum Purple Star Ruby Gem - 11ct Oval Cabochon (ID: 524855)

Oval Purple Star Ruby

11ct
12.8 x 11.3 mm
$ 131.76
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Light Pink Star Rose Quartz Gem - 142.1ct Oval Cabochon (ID: 305250)

Oval Pink Star Rose Quartz

142.1ct
30.7 x 26.5 mm
$ 312.51
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Pale Brown Star Moonstone Gem - 6.5ct Oval Cabochon (ID: 418945)

Oval Brown Star Moonstone

6.5ct
14.5 x 8.4 mm
$ 25.92
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4 pcs
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Dark Blue Star Sapphire Gem - 1.4ct Oval Cabochon (ID: 490188)

Oval Blue Star Sapphire

1.36 ct (total 5.43ctw)
7 x 5.1 mm
$ 97.74
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4 pcs
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Deep Navy Blue Star Sapphire Gem - 1ct Oval Cabochon (ID: 490244)

Oval Blue Star Sapphire

0.97 ct (total 3.86ctw)
7 x 5.1 mm
$ 69.48
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Navy Blue Star Sapphire Gem - 2.4ct Oval Cabochon (ID: 590490)

Oval Blue Star Sapphire

2.4ct
9.2 x 7.2 mm
$ 35.25
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Orange Yellow Star Moonstone Gem - 12.2ct Oval Cabochon (ID: 416862)

Oval Yellow Star Moonstone

12.2ct
14.5 x 11.7 mm
$ 48.88
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Black Star Diopside Gem - 3ct Pear Cabochon (ID: 480448)

Pear Black Star Diopside

3ct
10 x 6.9 mm
$ 4.46
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Medium-Light Orange Star Moonstone Gem - 5ct Oval Cabochon (ID: 418706)

Oval Orange Star Moonstone

5ct
11 x 8.9 mm
$ 19.88
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4 pcs
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Dark Blue Star Sapphire Gem - 1.2ct Oval Cabochon (ID: 490218)

Oval Blue Star Sapphire

1.23 ct (total 4.90ctw)
7 x 5.1 mm
$ 88.20
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 -> 10 star ratings
I purchased several green chrome tourmaline loose stones from GemSelect Twice over the last 2 years. Those stones made my wife' wedding ring, necklace and earings. Created by the goldsmith at Maus jewelers. . . Masterpieces of God's creation and mans creativity to the glory of God's love! they couldn't have done it without starting here first! FANTASTIC!!!
Posted By TourmalineDreams in August, 2020
Source: Bizrate
Overall Rating -> 9 star ratings
It really depends on the product for the end Highway arrives and the true colors the shape the size in all those things piano well I will definitely suggest to other people about gem select.
Posted By Sgt.Meds in August, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Easy to look at a lot of gems. Nice selection of sizes and prices. Fun to shop there.
Posted By Moose in August, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
GemSelect has a great variety of gemstones at a great price. Fast delivery.
Posted By Rme gems in August, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
Absolute Perfection ! Gemselects web site makes it is so easy to locate what ever you are looking for.
Posted By Tinbien in August, 2020
Source: Bizrate
Overall Rating -> 10 star ratings
I just learned and purchased a “citrine” crystal is hat I found out was a baked amethyst but it can be sold as citrine but it’s not. So I was looking for genuine Brazilian citrine and it brought me to this site, had a ton of selections in various cuts which was impressive and that it comes certified. Which is amazing.
Posted By Fonzi in August, 2020
Source: Bizrate
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Total Number of Articles: 1315

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Popular Gemstones
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All Gemstones (143)
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