Natural Star Gemstones
Discover rare star gemstones displaying the fascinating star effect known as asterism, perfect for collectors and unique jewelry designs.
|
Bi-color
|
Black
|
Blue
|
Brown
|
Golden
|
Gray
|
Green
|
Multicolor
|
Orange
|
Pink
|
Purple
|
Red
|
Turquoise
|
Violet
|
White
|
Yellow
|
Single |
Pairs |
Lots |
Faceted |
Cabochons |
3.06ct Blue Star Sapphire, Oval, Opaque
9 x 7 mm (calibrated)
$ 70.10
12.73ctw Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 63.40
15.26ct Purple Star Ruby, Oval, Opaque
16.2 x 13.4 mm
$ 200.63
5.80ct Black Star Diopside, Oval, Opaque
12 x 10 mm (calibrated)
$ 28.88
5.90ct Black Star Diopside, Oval, Opaque
12 x 10 mm (calibrated)
$ 29.38
48.94ct Pink Star Rose Quartz, Oval, Transparent
22.3 x 19.8 mm
$ 106.70
5.49ct Black Star Diopside, Oval, Opaque
12 x 10 mm (calibrated)
$ 27.34
1.49ct Blue Star Sapphire, Oval, Opaque
7.1 x 5.3 mm
$ 34.13
4.34ctw Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 95.10
1.15ct Blue Star Sapphire, Oval, Opaque
7 x 5 mm (calibrated)
$ 38.18
3.20ct Red Star Ruby, Oval, Opaque
9.7 x 7.6 mm
$ 147.78
5.84ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 29.08
4.68ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 23.31
1.38ct Black Star Diopside, Oval, Opaque
8 x 6 mm (calibrated)
$ 6.87
4.32ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 21.51
6.32ct Purple Star Ruby, Oval, Opaque
11.1 x 9.4 mm
$ 83.08
1.58ct Blue Star Sapphire, Oval, Opaque
6.9 x 5.3 mm
$ 32.88
4.43ctw Blue Star Sapphire, Oval, Opaque
7 x 5.2 mm
$ 88.25
6.42ct Purple Star Ruby, Oval, Opaque
12 x 10 mm (calibrated)
$ 298.40
4.46ctw Blue Star Sapphire, Oval, Opaque
7.1 x 5.3 mm
$ 97.72
6.66ct Black Star Diopside, Oval, Opaque
12 x 10 mm (calibrated)
$ 33.17
29.61ct Red Star Garnet, Oval, Opaque
18.3 x 16.6 mm
$ 29.19
3.64ct Black Star Sapphire, Oval, Opaque
9.1 x 8.4 mm
$ 65.25
5.88ct Black Star Diopside, Oval, Opaque
11 x 9 mm (calibrated)
$ 29.28
Why Buy Star Gemstones from GemSelect?
- Trusted Worldwide Since 2003
- Supplying natural gemstones to jewelers and collectors in 120+ countries
- Verified natural gemstones
- View All GemSelect Reviews on Bizrate
- Secure checkout and insured worldwide delivery
- 30-day returns and satisfaction guarantee
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 
the selection is good as are the prices
Overall Rating -> 10
Easy and functional
Overall Rating -> 8 
I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.
Overall Rating -> 10
Very pleasant
Overall Rating -> 8
The website was easy to use and there were a lot of good options, I was satisfied.
Overall Rating -> 10
I had a very easy time navigating the web page and using filters to find what I was looking for. The varied selection was nice to see and pricing is clear and fair.
