mineral

Pink potassium feldspar (likely orthoclase)

Orthoclase, KAlSi₃O₈; possibly intergrown with other feldspars

AI-generated identification · may be incorrect

Salmon-pink to tan, opaque, with blocky crystals and prominent near-90° cleavage; vitreous to dull luster. Mohs hardness 6; monoclinic crystal system; specific gravity about 2.55–2.63.

Identified September 29, 2026More mineral →

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Physical properties

Salmon-pink to tan, opaque, with blocky crystals and prominent near-90° cleavage; vitreous to dull luster. Mohs hardness 6; monoclinic crystal system; specific gravity about 2.55–2.63.

Formation & geological history

Crystallizes from silica-rich magma in granites and pegmatites, or forms during metamorphism. The specimen’s age and exact source cannot be determined from the image.

Uses & applications

Used as a flux in glass and ceramic manufacture; attractive crystals are collected and occasionally cut as gemstones.

Geological facts

Orthoclase is a major constituent of granite and is one of the minerals used in the Mohs hardness scale.

Field identification & locations

The pink color, blocky habit, and two cleavage directions meeting nearly at right angles are characteristic. Common in granites and pegmatites worldwide; a locality label helps collectors establish provenance.