orthoclase

Noun. (mineralogy) Potassium aluminum silicate, K Al Si₃O₈, a common feldspar of igneous, plutonic, and metamorphic rocks. Orthoclase is the main feldspar of pegmatite occurrences, where it is most commonly flesh-colored. Orthoclase is used in the ceramic and glass industries and as a decorative gravel.

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This entry was last updated on RefTopia from its source on 3/20/2012.