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Why choose an unheated sapphire?

Why opt for an unheated sapphire? Sapphires, which are the third hardest mineral on the Mohs scale of hardness, are part of the corundum family.

The Tanzanite

Tanzanite, the rival of Sapphire…. Rare gemstone, very rare to see, since we only know a single deposit in the world, Tanzanite is about to...