Gemstone | Definition, History, Types, & Facts | Britannica
https://www.britannica.com/science/gemstone
WEBgemstone, any of various minerals highly prized for beauty, durability, and rarity. A few noncrystalline materials of organic origin (e.g., pearl, red coral, and amber) also are classified as gemstones. Gemstones have attracted humankind since ancient times, and have long been used for jewelry.
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