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where is sandawana mine

Emeralds of the best quality were found in altered talctremolite schists at a distance of 15 to 30 cm from enclosed segregations of sodium feldspar The colour of emerald is deepgreen Only 10 to 15 of all emerald raw material extracted at this deposit is suitable for beneficiation and cutting The crystals display a distinct dichroism from bluish green to yellowgreen which may impart a