mineral
Pink potassium feldspar (likely orthoclase)
Orthoclase, KAlSi₃O₈
AI-generated identification · may be incorrectPink to salmon, vitreous to pearly luster, and blocky cleavage surfaces; hardness about 6 on Mohs scale, with two cleavages near 90°. The coarse, massive specimen may include quartz or other feldspar, so identification from the photo is not definitive.
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Physical properties
Pink to salmon, vitreous to pearly luster, and blocky cleavage surfaces; hardness about 6 on Mohs scale, with two cleavages near 90°. The coarse, massive specimen may include quartz or other feldspar, so identification from the photo is not definitive.
Formation & geological history
Potassium feldspar crystallizes as magma cools, commonly in granite and pegmatite; it can also form during metamorphism. Its age depends on its source rock and cannot be determined from the image.
Uses & applications
Used in ceramics and glassmaking; attractive crystals and feldspar-rich specimens are collected or used decoratively.
Geological facts
Orthoclase is a major component of many granites. Its name refers to its characteristic cleavage angles.
Field identification & locations
Pink color, blocky shape, and near-right-angle cleavage suggest feldspar; distinguish it from quartz by its cleavage and lower hardness. Common in granites worldwide, including pegmatites.
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