Black Star Cabs, Round - 7mm
- 8110269
- £1.40 exc.VAT
Black star is also known as black star sapphire/diopside and is a type of aluminium oxide. When cut into a dome shape it reveals a star feature. When cut with a flat top a golden colour is revealed. Common deposits are found in Russia, Pakistan, South Africa, Austria, Brazil, Italy, North America, Sri Lanka and Finland but most commonly India.
Shape: Round
Size: 8mm
Height: 5mm
Weight: 0.6grams
Colour: Black
Moh's hardness: 5.5 - 6.5
Density: 3.25 - 3.55
Cleavage: distinct/ good on
Refractive index: 1.665 - 1.73
Dispersion: Weak to distinct
Tags: , 8110269