PureGEM® Lab Grown EmeraldPureGem lab grown emeralds are physically and optically identical to mined emeralds the same beryl crystal structure, the same 7. 5 to 8 Mohs hardness, and the same vivid green colour that has made fine emerald one of the world's most coveted gemstones for centuries. Fine quality emeralds of significant size are among the rarest and most valuable coloured stones in existence. Every PureGem emerald is individually selected to meet or exceed the highest
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