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does black spots on the surface of the rubies is due to the presence of the mineral mica in it?

+1 vote
asked Oct 15, 2017 by resh_m (130 points)

1 Answer

0 votes
Perhaps that's a possibility for inclusions in ruby. Though one can't really make a blanket statement like that or even a generalization as each specimen is unique and inclusions can be caused by a host of items.
answered Oct 27, 2017 by hershel (52,820 points)