SKU:71863
Amadesa
Black Star Sapphire Oval Cabochon
Black Star Sapphire Oval Cabochon
Shipped from U.S. warehouse.
Delivery usually takes 2–3 weeks. Don’t worry - we take care of all taxes and customs.
Estimated arrival: 2025-12-15 – 2025-12-22
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The eye-catching six-ray star of this oval black star sapphire cabochon and its deep-black color make it an ideal choice for a centerpiece design such as a pendant. Partner these designs with complementary-color cabs to create matched sets with bracelets or earrings, or us it to create more complex, multi-stone necklace designs. Star sapphire is named for its distinctive six-ray star, visible under a single overhead light source, and occurs in black, blue and red corundum (red varieties are known as "star rubies"). The star is the result of intersecting needle-like inclusions within the gemstone that follow the underlying crystal structure and reflect light in a different direction than does the surrounding mineral, creating the appearance of the star. In a black sapphire, the inclusions are hematite, a mineral composed primarily of ferrous oxide. This star effect is known as “asterism.” The value of a given gemstone is based on the symmetry, orientation, definition, color and clarity of the star.
Specifications
- Color:
- Black
- Cutting center:
- Taiwan
- Enhancement:
- None (N)
- Gemstone type:
- Sapphire
- Mohs hardness:
- 9
- Price per unit:
- Priced per Each
- Refractive index:
- 1.762–1.77
- Specific gravity:
- 3.96–4.05
- Stone shape:
- Oval
- Stone size:
- 6 x 4mm
- Stone type:
- Natural
