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 |
5.77ctw Dark Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 152.33
6.98ct Black Star Diopside, Oval, Opaque
12 x 10 mm (calibrated)
$ 41.88
5.23ctw Navy Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 138.07
8.14ct Medium Light-Purple Star Ruby, Oval, Opaque
12 x 10 mm (calibrated)
$ 452.91
10.57ct Medium-Dark Purple Star Ruby, Oval, Opaque
13.7 x 11.1 mm
$ 167.42
8.30ct Medium-Dark Purple Star Ruby, Oval, Opaque
13 x 11 mm (calibrated)
$ 131.47
5.24ct Jam Red Star Ruby, Oval, Opaque
9.5 x 8.5 mm
$ 100.61
6.34ctw Deep Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 167.38
3.12ct Jam Red Star Ruby, Round, Opaque
8 mm (calibrated)
$ 59.90
4.94ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 24.70
12.00ct Rapberry Red Star Ruby, Oval, Opaque
14.7 x 12.8 mm
$ 190.08
4.80ct Black Star Diopside, Round, Opaque
9 mm (calibrated)
$ 28.80
8.61ct Reddish Purple Star Ruby, Oval, Opaque
12.7 x 9.9 mm
$ 123.98
32.18ct Orangish Gold Star Sapphire, Oval, Opaque
19 x 16.1 mm
$ 382.30
7.19ct Medium-Dark Purple Star Ruby, Oval, Opaque
12.2 x 10.6 mm
$ 113.89
8.65ct Black Star Sapphire, Oval, Opaque
12.4 x 10.5 mm
$ 207.60
5.37ct Medium Orange Star Moonstone, Oval, Translucent
12 x 8 mm (calibrated)
$ 25.78
6.26ctw Deep Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 135.22
9.90ct Reddish Purple Star Ruby, Oval, Opaque
12.6 x 10.5 mm
$ 550.84
5.59ct Black Star Sapphire, Oval, Opaque
11.2 x 8.5 mm
$ 134.16
7.25ct Brownish Orange Star Moonstone, Oval, Translucent
15 x 10 mm (calibrated)
$ 38.28
17.86ct Orangish Gold Star Sapphire, Oval, Opaque
16 x 12 mm (calibrated)
$ 192.89
1.52ct Deep Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 41.95
36.81ct Rose Pink Star Rose Quartz, Oval, Translucent
20 x 15 mm (calibrated)
$ 73.62
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Why Buy Star Gemstones from GemSelect?
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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 -> 9 
Plan on purchasing on an ongoing basis. So far.....so good....
Overall Rating -> 8 
Good prices
Overall Rating -> 10 
Great prices!!! High quality gemstones.
Overall Rating -> 10
All items were delivered on time with all items meeting or exceeding my expectations. Cut, clarity and color were very close to the photos and description.
Overall Rating -> 10
I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.
Overall Rating -> 10
It was good. There was a large selection at prices I could afford.
