igneous
Polished pink granite pebble
Granite, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectHardness about 6–7 Mohs; pink, gray, and black granular mosaic with a subdued polished luster. Crystalline texture, no obvious cleavage as a whole, and typical specific gravity around 2.6–2.7.
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Physical properties
Hardness about 6–7 Mohs; pink, gray, and black granular mosaic with a subdued polished luster. Crystalline texture, no obvious cleavage as a whole, and typical specific gravity around 2.6–2.7.
Formation & geological history
Slowly cooled felsic magma deep within continental crust, producing interlocking crystals; most granite formed during Precambrian–Phanerozoic plutonic events. This specimen appears tumbled or polished and may be an ornamental trade piece.
Uses & applications
Used widely as building stone, countertops, monuments, aggregate, and landscaping rock; polished pebbles are sold for crafts, décor, and collecting.
Geological facts
The pink color commonly comes from potassium feldspar, while dark flecks are biotite or amphibole and translucent grains may be quartz.
Field identification & locations
Identify it by its coarse, speckled interlocking crystals and inability to scratch glass easily; common worldwide, especially in exposed continental batholiths. Exact identification would require a close examination or mineral tests.
