igneous
Tumbled pink feldspar-rich stone, likely granite or microcline
Feldspar-dominant granitoid; probable potassium feldspar (orthoclase/microcline, KAlSi₃O₈) with quartz and minor iron-stained minerals
AI-generated identification · may be incorrectRounded and polished, salmon-pink to reddish-brown with cream patches and a vitreous-to-waxy luster. Feldspar has Mohs hardness 6–6.5, nonmetallic luster, blocky crystal structure, and two cleavage directions; exact specific gravity is likely about 2.6–2.7.
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Physical properties
Rounded and polished, salmon-pink to reddish-brown with cream patches and a vitreous-to-waxy luster. Feldspar has Mohs hardness 6–6.5, nonmetallic luster, blocky crystal structure, and two cleavage directions; exact specific gravity is likely about 2.6–2.7.
Formation & geological history
Probably formed by slow cooling of silica-rich magma, allowing coarse feldspar and quartz crystals to grow; granitoid rocks commonly formed during Precambrian to Phanerozoic continental crustal events. The pictured shape is human-tumbled and may obscure the original grain size.
Uses & applications
Used as decorative aggregate, landscaping stone, countertops, and ornamental tumbled material; generally not a jewelry gemstone except as an inexpensive cabochon or specimen.
Geological facts
The pink color commonly results from potassium feldspar, while reddish staining may reflect iron oxides. A firm identification would require a fresh surface, streak, hardness testing, and preferably thin-section or chemical analysis.
Field identification & locations
Look for visible interlocking pink feldspar, gray/clear quartz, and dark mica or amphibole; it should scratch glass but not quartz. Common sources include granite terrains worldwide, especially India, Brazil, Madagascar, and North America.
