what is pleochroism in gemstones? Pleochroism is a fascinating phenomenon that occurs in some gemstones. The term comes from the Greek words "pleo" meaning "more" and "chroma" meaning "color". In pleochroic gems, the color changes when viewed from different angles due to the differential absorption of light waves traveling through the crystal. This optical property is one of the key factors that make certain gemstones prized by collectors, jewelers, and gemologists alike.

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