Red granite consisting mainly of pink orthoclase feldspar and colorless quartz, a widely used construction stone and building material

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Photo credit: © Henri Koskinen / Alamy / Afripics
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Keywords: -feldspar., construction, feldspar, formation, granite, igneous, kalsi3o8, massive, material, mineral, minerals, natural, orthoclase, pink, potassium, quartz, raw, red, rock, stone, tectosilicate