igneous
Tumbled pink granite
Granite (quartz, feldspar, and mica; exact variety uncertain)
AI-generated identification · may be incorrectRounded, polished pebble with a pink-brown groundmass and pale mineral flecks. Granite is typically Mohs 6–7, with a granular texture, vitreous quartz, and feldspars with two cleavage directions; exact properties depend on its mineral mix.
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Physical properties
Rounded, polished pebble with a pink-brown groundmass and pale mineral flecks. Granite is typically Mohs 6–7, with a granular texture, vitreous quartz, and feldspars with two cleavage directions; exact properties depend on its mineral mix.
Formation & geological history
Granite forms when silica-rich magma cools slowly underground, allowing visible crystals to grow. The pebble was later weathered and rounded, then tumbled; its geological age cannot be determined from the image.
Uses & applications
Used as decorative stone, paving and building material, countertops, and landscaping aggregate; small polished pieces are sold as collectibles.
Geological facts
Granite is an intrusive igneous rock, not a single mineral. Its pink color commonly comes from potassium feldspar.
Field identification & locations
The speckled, interlocking grains suggest granite, but the photo does not show enough detail for a confident identification. Common worldwide, especially in continental mountain belts; a fresh broken surface or magnification can reveal its crystals.
