News – Natural Spinel Gemstone

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What is Spinel? - Everything You need to Know

Dec 01, 2022

What is Spinel? - Everything You need to Know Spinel has a hardness of 8 on the Mohs hardness scale, diamond has a hardness of 10, and ruby and sapphire have a hardness of 9. A specific gravity of 3.6 and a refractive index of 1.718. It is transparent to opaque and has a vitreous lustre. Spinel i...

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