igneous
Tumbled pink feldspar-rich granite (likely potassium feldspar)
Granite/pegmatitic feldspar aggregate; chiefly KAlSi₃O₈ with quartz and minor mica or iron oxides
AI-generated identification · may be incorrectCoarse crystalline, salmon-pink and cream with dark mineral inclusions; vitreous to pearly luster, uneven fracture, no obvious cleavage in the rounded piece, and Mohs hardness about 6–7 (feldspar ~6, quartz ~7).
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Physical properties
Coarse crystalline, salmon-pink and cream with dark mineral inclusions; vitreous to pearly luster, uneven fracture, no obvious cleavage in the rounded piece, and Mohs hardness about 6–7 (feldspar ~6, quartz ~7).
Formation & geological history
An intrusive igneous rock that crystallized slowly from silica-rich magma, commonly during Precambrian to Phanerozoic continental plutonism; later weathering and stream abrasion produced the smooth shape.
Uses & applications
Used as a decorative tumbled stone, lapidary material, aggregate, dimension stone, and source of feldspar for ceramics and glass; generally not gem-grade.
Geological facts
The salmon color typically comes from iron-bearing potassium feldspar, while gray-green patches may represent altered feldspar or mica. A glass scratch test can help distinguish quartz-rich granite from softer feldspar-dominant material.
Field identification & locations
Identify by visible interlocking grains, pink feldspar, pale quartz, and dark mica/amphibole; common in granitic terrains worldwide, including North America, Scandinavia, India, and Brazil.
