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Wednesday, April 15, 2015

Ruby Diamond Engagement Ring.1993

Ruby Diamond Engagement Ring.




Ruby Diamond Engagement Ring.
By Farzana Aamir.
Rubies have a hardness of 9.0 on the Mohs scale of mineral hardness. Among the natural gems only moissanite and diamond are harder, with diamond having a Mohs hardness of 10.0 and moissonite falling somewhere in between corundum (ruby) and diamond in hardness. 

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