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red found gem green

Garnet, group of common silicate minerals, including some gemstones and some varieties used as abrasives. They are transparent to translucent, red, brown, green, yellow, and white, and have a glassy luster. The most highly valued garnet gem is demantoid, an emerald green variety found in the former USSR and Italy. Perhaps the most popular is a ruby red pyrope found in South Africa, Bohemia, Arizona, and New Mexico. Crushed garnet is used as an abrasive for sand-blasting, dental wheels, lens grinding, and sandpaper.

See also: Gem.

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