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How are gemstones classified by color?
How are gemstones classified by color?
Gemstones are often classified by color into categories such as red (e.g., rubies, red tourmalines), blue (e.g., sapphires, aquamarines), green (e.g., emeralds, peridots), and colorless (e.g., diamonds, white sapphires).
gemstones classified by color