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  • 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: Pink granite, Mohs hardness and moonstone - Geology. com
    Orthoclase is a feldspar mineral with a chemical composition of KAlSi 3 O 8 It is one of the most abundant rock-forming minerals of the continental crust Orthoclase is most widely known as the pink feldspar found in many granites and as the mineral assigned a hardness of "6" in the Mohs hardness scale Orthoclase has several commercial uses
  • Orthoclase Mineral Physical-Optical Properties, Uses, Occurrence
    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
  • Orthoclase: Mineral information, data and localities. - mindat. org
    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 Despite the enormous number of reports of orthoclase in granite pegmatite s, orthoclase is rare in pegmatitic pockets
  • Orthoclase | Feldspar, Silicate, Mohs Scale | Britannica
    Orthoclase, common alkali feldspar mineral, a potassium aluminosilicate (KAlSi3O8); 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
    Intrusive and extrusive igneous, and metamorphic rocks Common world wide occurrences Link to MinDat org Location 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
  • The Mineral orthoclase - The Mineral and Gemstone Kingdom
    Detailed description, properties, locality information guide about the potassium feldspar mineral orthoclase and adularia
  • 50 Facts About Orthoclase
    Orthoclase, a common mineral in the feldspar group, plays a significant role in geology and everyday life Found in granite and other igneous rocks, it forms large, often pink crystals that are both beautiful and scientifically important
  • ORTHOCLASE - Crystallography Gems
    orthoclase The most abundant mineral in the Earth’s crust a tectosilicate mineral that forms in intrusive igneous rock from liquid magma Its name means “right fracture” due to its right angle of good cleavage, first described in 1801
  • Orthoclase - Clark Science Center
    Orthoclase is often confused with quartz - try looking for cloudy patches on individual crystals in plain polarized light which indicate weathering of the crystal And check to see if the crystal is uniaxial or biaxial





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