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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
    Orthoclase is the feldspar mineral of pink granite, the #6 mineral of the Mohs hardness scale, and one of the two minerals that comprise Moonstone
  • 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: The mineral Orthoclase information and pictures
    Detailed description, properties, locality information guide about the potassium feldspar mineral orthoclase and adularia
  • 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
  • C:\MdpWEB\O\Orthoclase. PDF - Handbook of Mineralogy
    Physical Properties: Cleavage: Perfect on f001g and partings on f110g, and Fracture: Conchoidal to uneven Tenacity: f010g; f100g, f110g, Brittle Hardness = 6{6 5 D(meas ) = 2 55{2 63 f201g Optical Properties: Transparent to translucent
  • Orthoclase - Rock Identifier
    Orthoclase is a feldspar mineral and one of the most common rock-forming materials in Earth's crust It is usually encountered within different types of granite, where it is responsible for the pinkish or lighter flecks in that rock
  • Orthoclase - Gems Minerals
    Orthoclase is a potassium-rich feldspar mineral and one of the primary constituents of the Earth’s continental crust It is a major rock-forming mineral commonly found in granites, syenites, and other felsic igneous rocks





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