All About Sapphire Gemstones

Gemstones from the corundum mineral family are the second hardest mineral on the Earth, just after diamonds. The stone ranks at the 9 moh scale on the hardness of the stone. Apart from the ruby stone, all the gemstones found in the corundum mineral family are named sapphire. The ruby stone is also a precious member of the corundum mineral family and henceforth the stone is also known as Red Sapphire.

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