mineral
Pink potassium feldspar (likely massive orthoclase)
Orthoclase, KAlSi₃O₈ (possibly microcline; visual identification is uncertain)
AI-generated identification · may be incorrectSalmon-pink to pale pink, opaque, with a vitreous-to-dull luster and blocky cleavage surfaces. Mohs hardness is about 6; feldspar has a monoclinic or triclinic crystal structure and specific gravity near 2.6.
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Physical properties
Salmon-pink to pale pink, opaque, with a vitreous-to-dull luster and blocky cleavage surfaces. Mohs hardness is about 6; feldspar has a monoclinic or triclinic crystal structure and specific gravity near 2.6.
Formation & geological history
Potassium feldspar crystallizes as magma cools, commonly in granite and pegmatite; it may also form during metamorphism. The specimen’s precise age and source cannot be determined from the image.
Uses & applications
Used in ceramics and glassmaking as a flux; attractive pieces are collected or occasionally used decoratively.
Geological facts
Pink color commonly comes from trace iron or other impurities. Feldspar is one of the most abundant mineral groups in Earth’s crust.
Field identification & locations
The pink color and blocky, nearly right-angle cleavage are consistent with potassium feldspar; distinguish it from quartz by its cleavage and lower hardness. Common in granites and pegmatites worldwide.
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