Natural Star Gemstones
Discover rare star gemstones displaying the fascinating star effect known as asterism, perfect for collectors and unique jewelry designs.
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Bi-color
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Black Star Gemstones
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Blue Star Gemstones
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Brown Star Gemstones
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Golden Star Gemstones
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Gray Star Gemstones
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Green
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Multicolor
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Orange Star Gemstones
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Pink Star Gemstones
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Purple Star Gemstones
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Red Star Gemstones
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Turquoise
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Violet
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White
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Yellow Star Gemstones
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
9.44ct Reddish Purple Star Ruby, Oval, Opaque
13 x 11 mm (calibrated)
$ 149.53
4.29ct Jam Red Star Ruby, Pear Shape, Opaque
8.7 x 7.8 mm
$ 82.37
11.40ct Medium Purple Star Ruby, Oval, Opaque
13.9 x 11.3 mm
$ 180.58
4.97ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 29.82
3.05ct Deep Red Star Ruby, Oval, Opaque
8.8 x 7.9 mm
$ 58.56
6.03ct Black Star Sapphire, Oval, Opaque
10.9 x 9.9 mm
$ 144.72
2.69ctw Deep Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 61.87
43.69ct Orangish Gold Star Sapphire, Oval, Opaque
20.7 x 17.4 mm
$ 519.04
4.76ct Raspberry Red Star Ruby, Oval, Translucent
10.4 x 9.7 mm
$ 75.40
1.55ct Black Star Diopside, Oval, Opaque
8 x 6 mm (calibrated)
$ 9.30
7.89ct Medium-Light Brown Star Moonstone, Oval, Translucent
13.8 x 11.4 mm
$ 41.66
9.06ct Black Star Diopside, Round, Opaque
11 mm (calibrated)
$ 54.36
10.35ctw Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 51.75
30.58ct Dark Red Star Garnet, Oval, Opaque
17.4 x 14.1 mm
$ 36.32
6.23ct Pinkish Purple Star Ruby, Oval, Opaque
11 x 8.1 mm
$ 346.64
8.90ct Black Star Diopside, Round, Opaque
12 mm (calibrated)
$ 53.40
6.07ct Black Star Diopside, Round, Opaque
11 mm (calibrated)
$ 36.42
4.15ct Reddish Purple Star Ruby, Oval, Opaque
9.7 x 8.8 mm
$ 79.68
15.62ct Dark Red Star Garnet, Oval, Opaque
16.9 x 11.7 mm
$ 19.49
10.16ct Dark Red Star Garnet, Oval, Opaque
12.1 x 10.9 mm
$ 12.07
1.34ct Black Star Diopside, Oval, Opaque
8 x 6 mm (calibrated)
$ 8.04
3.97ct Medium Purple Star Ruby, Oval, Opaque
10.1 x 9 mm
$ 76.22
3.51ct Medium Red Star Ruby, Oval, Opaque
10.2 x 9 mm
$ 67.39
5.06ct Raspberry Red Star Ruby, Oval, Opaque
12.2 x 9.2 mm
$ 126.50
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Why Buy Star Gemstones from GemSelect?
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- Supplying natural gemstones to jewelers and collectors in 120+ countries
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Natural Star Gemstones
Our natural star gemstones display the rare optical phenomenon known as asterism, where a star-shaped reflection appears across the gem’s surface. These unique stones are prized by collectors and jewelers for their striking appearance and rarity.
Star Gemstones Online
Buy star gemstones online at GemSelect with confidence. Our collection includes star sapphire, star ruby, and other rare gems with visible star effects, all available as loose stones ready for custom jewelry.
The Unique Star Effect (Asterism)
The star seen in these gemstones is caused by tiny needle-like inclusions that reflect light in a star-shaped pattern. This optical phenomenon, called asterism, becomes visible when the gemstone is cut as a smooth cabochon.
Star Sapphire Gemstones
Star sapphire is the most famous star gemstone, often displaying a clear six-rayed star across its surface. These gems are durable and popular for rings, pendants, and collector pieces.
Star Ruby Gemstones
Star rubies are rare and highly valued. When illuminated, they reveal a sharp star pattern over their deep red body color, making them one of the most sought-after asterism gemstones.
Cabochon Cut Star Stones
Star gemstones are typically cut as cabochons rather than faceted stones. The smooth, domed surface allows the star effect to appear clearly when the gem is viewed under direct light.
Loose Star Gemstones for Jewelry
Loose star gemstones are perfect for custom jewelry designs. Their distinctive optical effect makes them ideal for rings, pendants, and statement pieces that stand out from traditional faceted gems.
Collectible Star Gemstones
Many collectors seek star gemstones due to their rarity and unusual appearance. High-quality stones with centered and well-defined stars are especially desirable among gem enthusiasts.
Learn more about the properties and fascinating optical effects of gemstones on our Gemstone Optical Effects Guide.
FAQs
What are star gemstones?
Star gemstones are gems that display a star-shaped reflection on their surface. This optical phenomenon is called asterism and is most commonly seen in star sapphire and star ruby.
What causes the star effect in gemstones?
The star effect is caused by microscopic needle-like inclusions inside the gem that reflect light in intersecting lines, creating a visible star pattern when viewed under direct light.
Which gemstones show a star effect?
The most well-known star gemstones are star sapphire and star ruby, but asterism can also appear in gems like star garnet, star diopside, and occasionally in quartz.
Why are star gemstones cut as cabochons?
The cabochon cut allows the star pattern to appear clearly on the gem’s surface. Faceting would disrupt the optical effect and prevent the star from forming.
How can you see the star in a gemstone?
The star becomes visible when light hits the surface of the gemstone. Rotating the stone under a light source will make the star move across the surface.
GemSelect Certified Store Reviews
GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!
Overall Rating -> 10 
Enjoy every moment
Overall Rating -> 10
I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!
Overall Rating -> 9 
If you have motion picture, then I will be more satisfied with.
Overall Rating -> 9
The purchasing process is fairly quick and straightforward and for me user friendly so it probably took more or less than 3 minutes to purchase and pay for the items. I wish there was a discount offer for multiple items to encourage us buyers to purchase more an incentive and add more sales in your end. Besides that, it's been a great purchasing experience and will continue to shop as I am a repeat customer and have bought from your store many times before. Thank you.
Overall Rating -> 10
Took a chance on purchasing my gemstones from Gemselect and was impressed. 10/10
Overall Rating -> 10
I have purchased stones from gem select in the past and have been very satisfied. I expect to repeat that experience with this purchase as well
