Gemstones can be divided into two major groups: diamonds and colored gemstones . While diamonds are sought after for their rarity and unparalleled hardness, colored gemstones such as rubies, sapphires,...
Gemstones can be divided into two major groups: diamonds and colored gemstones . While diamonds are sought after for their rarity and unparalleled hardness, colored gemstones such as rubies, sapphires,...
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