mineral

Tumbled pink feldspar (likely orthoclase or microcline)

Potassium feldspar, KAlSi₃O₈

AI-generated identification · may be incorrect

Pale salmon-pink, rounded and polished, with a vitreous-to-waxy luster; feldspar hardness is about 6 Mohs, with two good cleavage directions and a monoclinic or triclinic crystal structure. The image is insufficient for definitive identification; quartzite or pink calcite are alternatives.

Identified August 11, 2026More mineral →

Explore Tumbled pink feldspar (likely orthoclase or microcline) in the encyclopedia →

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Physical properties

Formation & geological history

Formed by crystallization in silica-rich igneous rocks such as granite and pegmatite, generally during Precambrian to younger geological events. This specimen has been mechanically tumbled and polished.

Uses & applications

Used in glass and ceramic manufacture, as an industrial feldspar flux, and occasionally as an inexpensive lapidary or ornamental stone. Common tumbled pieces typically have modest collector value.

Geological facts

Pink color commonly results from trace iron or other impurities. Potassium feldspar is one of the most abundant minerals in Earth’s continental crust.

Field identification & locations

Common in granites, pegmatites, and metamorphic rocks worldwide, especially in feldspar-rich areas. A glassy appearance, hardness near 6, and cleavage distinguish it from softer calcite; a streak, hardness, and acid test would improve identification.