mineral

Tumbled white feldspar, possibly moonstone

Likely potassium feldspar (orthoclase, KAlSi₃O₈); identification is tentative from the image

AI-generated identification · may be incorrect

Opaque to slightly translucent, cream-white with faint reddish staining and a polished surface; feldspar has Mohs hardness 6, vitreous-to-pearly luster, and two good cleavage directions. The image does not show a clear moonstone sheen.

Identified October 8, 2026More mineral →

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Physical properties

Formation & geological history

Feldspar crystallizes in igneous and metamorphic rocks; potassium feldspar commonly forms in granites and pegmatites. Its geological age depends on the source rock.

Uses & applications

Feldspar is used in ceramics and glass; attractive pieces are cut, polished, or collected as decorative stones.

Geological facts

Feldspar is the most abundant mineral group in Earth's crust. Moonstone is a feldspar variety valued for its floating optical sheen, not apparent here.

Field identification & locations

A hardness near 6 and two cleavages meeting at roughly right angles support feldspar identification; common sources include granites and pegmatites worldwide. A small tumbled piece like this typically sells for about $1–$10.