Black Star Sapphire Gemstones
Explore natural black star sapphire gemstones with striking star effects and rich dark tones.
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Bi-color
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Black Black Star Sapphire
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Blue
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Brown
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Golden
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Gray
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Green
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Multicolor
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Orange
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Pink
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Purple
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Red
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Turquoise
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Violet
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White
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Yellow
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Single |
Pairs |
Lots |
Faceted |
Cabochons |
5.50ct Black Star Sapphire, Oval, Opaque
11 x 9 mm (calibrated)
$ 109.56
6.82ct Black Star Sapphire, Oval, Opaque
12 x 10 mm (calibrated)
$ 135.85
3.95ct Black Star Sapphire, Oval, Opaque
10.5 x 8 mm
$ 70.82
4.01ct Black Star Sapphire, Pear Shape, Opaque
11 x 7.9 mm
$ 71.89
5.12ct Black Star Sapphire, Oval, Opaque
11.4 x 9.7 mm
$ 101.99
3.86ct Black Star Sapphire, Pear Shape, Opaque
9.6 x 7.7 mm
$ 69.21
6.03ct Black Star Sapphire, Oval, Opaque
10.9 x 9.9 mm
$ 120.12
4.70ct Black Star Sapphire, Oval, Opaque
10.5 x 8.4 mm
$ 84.26
4.23ct Black Star Sapphire, Oval, Opaque
9.4 x 7.9 mm
$ 75.84
2.82ct Black Star Sapphire, Oval, Opaque
9 x 7 mm (calibrated)
$ 50.56
4.00ct Black Star Sapphire, Oval, Opaque
10.5 x 8.2 mm
$ 71.71
5.09ct Black Star Sapphire, Oval, Opaque
10.3 x 8.4 mm
$ 91.25
3.64ct Black Star Sapphire, Oval, Opaque
9.1 x 8.4 mm
$ 65.25
7.64ct Black Star Sapphire, Oval, Opaque
12 x 10 mm (calibrated)
$ 152.19
6.71ct Black Star Sapphire, Oval, Opaque
11 x 9 mm (calibrated)
$ 133.66
5.76ct Black Star Sapphire, Oval, Opaque
10.4 x 9 mm
$ 86.05
4.23ct Black Star Sapphire, Oval, Opaque
10.4 x 7.6 mm
$ 75.84
6.28ct Black Star Sapphire, Oval, Opaque
11 x 9 mm (calibrated)
$ 93.82
6.54ct Black Star Sapphire, Oval, Opaque
10.7 x 8.4 mm
$ 130.28
7.81ct Black Star Sapphire, Oval, Opaque
12 x 10 mm (calibrated)
$ 155.58
34.34ct Black Star Sapphire, Oval, Opaque
20.2 x 16.8 mm
$ 444.63
3.50ct Black Star Sapphire, Oval, Opaque
10 x 8 mm (calibrated)
$ 62.75
4.69ct Black Star Sapphire, Pear Shape, Opaque
11 x 9 mm (calibrated)
$ 84.08
4.38ct Black Star Sapphire, Oval, Opaque
10 x 8 mm (calibrated)
$ 73.15
Why Buy Black Star Sapphire from GemSelect?
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Natural Black Star Sapphire
Our natural black star sapphire gemstones display a unique optical phenomenon known as asterism, forming a distinct star across the surface when viewed under light. These gemstones are carefully selected for their strong star visibility and deep, rich color.
Black Star Sapphire Gemstones Online
Buy black star sapphire gemstones online at GemSelect with confidence. We offer a wide range of loose stones, detailed product information, and secure worldwide shipping for a smooth shopping experience.
Star Sapphire Cabochons
Black star sapphires are typically cut as cabochons to enhance the star effect. The smooth, domed surface allows the star to appear clearly, making these stones ideal for statement rings and pendants.
Strong Asterism and Quality Factors
The value of a black star sapphire depends on the sharpness and centering of the star, body color, and overall clarity. Stones with a well-defined, symmetrical star and good contrast are especially desirable.
Black Star Sapphire for Jewelry
Black star sapphire gemstones are durable and suitable for everyday jewelry. With a Mohs hardness of 9, they are perfect for rings, cufflinks, pendants, and other custom designs requiring both beauty and strength.
Loose Star Sapphires for Collectors
Collectors appreciate black star sapphire gemstones for their rarity and natural optical effects. Each stone is unique, making them excellent additions to any gemstone collection.
Wholesale Black Star Sapphire
We offer competitive pricing on loose black star sapphire gemstones for bulk buyers, jewelers, and designers looking for consistent quality and reliable supply.
September Birthstone Sapphire
Sapphire is the birthstone for September and is associated with wisdom and protection. Black star sapphires provide a distinctive alternative to traditional blue sapphires.
Learn more about star sapphires, their formation, and properties on our Star Sapphire Information Page.
FAQs
What is a black star sapphire?
A black star sapphire is a variety of sapphire that shows a star-shaped light effect (asterism) caused by inclusions within the stone. The star becomes visible under direct light.
Are black star sapphire gemstones natural?
Yes, all black star sapphire gemstones at GemSelect are natural. Any treatments, if present, are clearly disclosed for full transparency.
Why are star sapphires cut as cabochons?
Cabochon cutting enhances the visibility of the star effect. Faceting would disrupt the asterism, so a smooth dome is preferred.
Is black star sapphire suitable for daily wear?
Yes, with a hardness of 9 on the Mohs scale, black star sapphire is durable enough for everyday jewelry such as rings and pendants.
What determines the quality of a black star sapphire?
Quality is based on the sharpness and symmetry of the star, body color, transparency, and overall appearance. A centered, well-defined star is most valuable.
Can I buy black star sapphire in calibrated sizes?
Yes, we offer a selection of calibrated black star sapphire gemstones suitable for standard jewelry settings, along with unique free-size stones.
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
Have made 2 purchases so far from GemSelect and they have been amazing! Anytime I requested additional info, videos or pictures of a particular item, the response was always timely and helpful. This is a great place to buy, if you are looking for loose stones. Highly recommend!
Overall Rating -> 10
I was looking for high-quality amethyst on this site, and I was able to compare size, color, and weight in detail before making a purchase.
Overall Rating -> 8 
Site worked well and helped me find a rock that matched what I was looking for. Well within budget and I trust it will show up, so that's definitely positive. Not much else to it. Satisfied.
Overall Rating -> 10
GemSelect offers excellent choices, prices & service- highly recommended! Unfortunately, prior to ordering a replacement gemstone, my jeweler neglected to mention it needed to be one that was a'cushion cuta' to fit the existing mount. Have yet to return/exchangea'
Overall Rating -> 8
It was fine
