mineral

Tumbled white feldspar pebble

Likely albite or potassium feldspar (feldspar-group aluminosilicate; exact species uncertain from photo)

AI-generated identification · may be incorrect

Opaque to slightly translucent, cream-white with small dark inclusions; vitreous to dull luster, typically Mohs 6, with two cleavages near 90°. Feldspars have a triclinic or monoclinic crystal structure and specific gravity around 2.5–2.8.

Identified October 6, 2026More mineral →

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Physical properties

Formation & geological history

Feldspar crystallizes in igneous rocks and also occurs in metamorphic rocks; this rounded, smoothed piece was likely naturally worn or mechanically tumbled. Its age cannot be determined from the image.

Uses & applications

Feldspar is widely used in glass and ceramics; attractive pieces may be polished for jewelry or collected.

Geological facts

Feldspar is the most abundant mineral group in Earth’s crust. The dark flecks may be inclusions or surface staining, not diagnostic of a particular variety.

Field identification & locations

A white, hard pebble with feldspar-like cleavage is consistent with feldspar, but species identification needs tests or a fresh surface. Feldspar occurs worldwide in granites, pegmatites, and metamorphic rocks.