![]() They both belong to the previous category of gemstones. They both have a refractive index of 1.757 – 1.779.īoth carry a specific gravity of 3.99 – 4.0. They both belong to the corundum family and have a rank of 9.0 on the Mohs scale of hardness. ![]() ![]() Since there are very close similarities between sapphire and natural ruby gemstone that create confusion in the mind of an individual to distinguish between ruby and sapphire easily. Gem lovers are always curious to know the difference between sapphire and ruby stone.
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