Orthoclase - Wikipedia Orthoclase, or orthoclase feldspar (endmember formula K Al Si 3 O 8), is an important tectosilicate mineral which forms igneous rock The name is from the Ancient Greek for "straight fracture", because its two cleavage planes are at right angles to each other
Orthoclase: Mineral information, data and localities. Orthoclase is the most common member of the series, being the dominant K-feldspar in most granite, granitic rocks and other plutonic rocks, with an intermediate cooling regime
Orthoclase Mineral Physical-Optical Properties, Uses, Occurrence An important rock-forming mineral, orthoclase is the potassium-bearing end member of the potassium sodium feldspar solid-solution series It is a major component of granite its pink crystals give granite its typical color
Orthoclase | Feldspar, Silicate, Mohs Scale | Britannica orthoclase, common alkali feldspar mineral, a potassium aluminosilicate (KAlSi 3 O 8); it usually occurs as variously coloured, frequently twinned crystals in granite Orthoclase is used in the manufacture of glass and ceramics; occasionally, transparent crystals are cut as gems
Orthoclase Mineral Data From the Greek orthos - "right" and kalo -" I cleave" in allusion to the mineral's right angle of good cleavage Comments: Striated, dark violet crystal of lorenzenite in cream-colored orthoclase Location: Khibiny Massif, Kola Peninsula, Russia Scale: 1 3 x 1 2 cm Comments: Carlsbad twinned crystal of orthoclase
Orthoclase — Grokipedia Orthoclase serves as a significant gem material through its varieties, particularly moonstone and amazonite, valued for their optical effects and aesthetic appeal in jewelry
Orthoclase: Properties, Uses, and Mineralogical Data | Encyclopedia Orthoclase is a potassium feldspar mineral with the chemical formula KAlSi₃O₈ It features a Mohs hardness of 6 and 90° cleavage, occurring as a major component in igneous rocks and serving as a raw material for ceramics, glass, and Moonstone gemstones