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Buy Star Gemstones

(1543)
Gem Type Weight Size Clarity Price Origin
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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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Light Grey Star Sapphire Gem - 10.7ct Oval Cabochon (ID: 470842)

Oval Gray Star Sapphire

10.7ct
11.7 x 11.1 mm
$ 374.15
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1 pc
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Medium 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 - 10.4ct Oval Cabochon (ID: 416501)

Oval Yellow Star Moonstone

10.4ct
14.1 x 12.2 mm
$ 41.72
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1 pc
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Black Star Sapphire Gem - 4.7ct Oval Cabochon (ID: 470221)

Oval Black Star Sapphire

4.7ct
10.6 x 8.3 mm
$ 93.00
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1 pc
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Medium-Dark Pink Star Rose Quartz Gem - 529.6ct Oval Cabochon (ID: 505891)

Oval Pink Star Rose Quartz

529.6ct
50.1 x 43.7 mm
$ 794.44
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1 pc
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Brownish Orange Star Moonstone Gem - 10.5ct Oval Cabochon (ID: 418361)

Oval Orange Star Moonstone

10.5ct
14.6 x 10.8 mm
$ 42.12
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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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1 pc
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Brownish Orange Star Moonstone Gem - 11.4ct Oval Cabochon (ID: 418366)

Oval Orange Star Moonstone

11.4ct
14.5 x 11 mm
$ 45.48
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1 pc
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Cantaloupe Orange Star Moonstone Gem - 14.5ct Oval Cabochon (ID: 418363)

Oval Orange Star Moonstone

14.5ct
15.8 x 13.7 mm
$ 57.88
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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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Medium Rose Pink Star Rose Quartz Gem - 163.2ct Oval Cabochon (ID: 305379)

Oval Pink Star Rose Quartz

163.2ct
32.1 x 28.8 mm
$ 326.40
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Light Coffee Brown Star Moonstone Gem - 10.1ct Oval Cabochon (ID: 416875)

Oval Brown Star Moonstone

10.1ct
14.7 x 9.6 mm
$ 40.36
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Medium Rose 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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Light Yellow Star Moonstone Gem - 12.5ct Oval Cabochon (ID: 484388)

Oval Yellow Star Moonstone

12.5ct
15.3 x 13.2 mm
$ 50.04
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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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Medium Pink Star Rose Quartz Gem - 248.2ct Oval Cabochon (ID: 505883)

Oval Pink Star Rose Quartz

248.2ct
36.1 x 33.6 mm
$ 372.27
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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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Medium Pink Star Rose Quartz Gem - 254.7ct Oval Cabochon (ID: 505885)

Oval Pink Star Rose Quartz

254.7ct
38.4 x 32.2 mm
$ 382.00
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1 pc
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Medium-Dark Orange Star Moonstone Gem - 10.6ct Oval Cabochon (ID: 418369)

Oval Orange Star Moonstone

10.6ct
14.9 x 12.2 mm
$ 42.48
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2 pcs
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Black Star Diopside Gem - 4ct Round Cabochon (ID: 502187)

Round Black Star Diopside

3.99 ct (total 7.97ctw)
9.2 mm
$ 15.94
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
My experiences with Gemselect have always been quite satisfactory. The items are accurately photographed, a detailed description and provenance provided and the compare feature helps customers select the best gem for their needs. I have often recommended this source and will continue to do so.
Posted By GemGirl in November, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
I ordered several specific items from Gemselect. Items are always packaged very carefully to protect the content. Gemselect always encloses a card of authenticity which documents the entire stone, its size, clarity, etc. All of the items are as they were described. I would highly recommend them to anyone who’s in the market for a gem.
Posted By Ron in November, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
I frequently check the GemSelect website for a variety of gems. I've been very satisfied with the selection and quality of the top rated gems. All of the purchases I've made have turned out beautiful pieces of jewelry.
Posted By Steve in November, 2019
Source: Bizrate
Overall Rating -> 10 star ratings
Outstanding user interface. Clear images and videos. Easy filtering and searching of large inventory.
Posted By Dan in November, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
really good gem selection will becoming back
Posted By Jehuty in November, 2019
Source: Bizrate
Overall Rating -> 9 star ratings
I enjoyed the purchase and all the choices. You have great online information about your company and guarantees.
Posted By Philipj in November, 2019
Source: Bizrate
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More Shapes
  • Asscher Cut
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  • Cushion Checkerboard
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  • Cushion Concave Fantasy Cut
  • Cushion Crystal Cluster
  • Cushion Mixed Cut
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  • Cushion-Cut
  • Diamond-Cut
  • Drilled Faceted Sphere
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  • Drop / Pear
  • Fancy Cabochon
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  • Pencil
  • Pencil Cut
  • Pentagon Facet
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Popular Gemstones
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All Gemstones (144)
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