orthoclase

== English == === Etymology === From ortho- +‎ -clase. === Pronunciation === === Noun === orthoclase (countable and uncountable, plural orthoclases) (mineralogy) Potassium aluminum silicate, KAlSi3O8, 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. ==== Derived terms ==== orthoclasic ==== Translations ==== ==== See also ==== rock, mineral, pegmatite sanidine, adularia === Further reading === David Barthelmy (1997–2026), “Orthoclase”, in Webmineral Mineralogy Database. “orthoclase”, in Mindat.org‎[1], Hudson Institute of Mineralogy, 2000–2026.