
igneous
Rounded pink granite pebble
Granite, chiefly quartz, potassium feldspar, plagioclase, and biotite; exact identification is limited by the small image
AI-generated identification · may be incorrectHardness about 6–7 Mohs; salmon-pink, cream, and white coloration with a dull to granular luster. Its rounded shape indicates water or abrasion; individual crystals are poorly resolved.
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Physical properties
Hardness about 6–7 Mohs; salmon-pink, cream, and white coloration with a dull to granular luster. Its rounded shape indicates water or abrasion; individual crystals are poorly resolved.
Formation & geological history
Granite crystallizes slowly from silica-rich magma deep in continental crust, commonly during Precambrian to Phanerozoic intrusive events, then becomes exposed and rounded by weathering and transport.
Uses & applications
Granite is widely used as building stone, countertops, monuments, aggregate, and decorative landscaping material; this small pebble has mainly educational or ornamental value.
Geological facts
The pink color usually comes from potassium feldspar, while quartz contributes pale gray or translucent grains. A hand lens may reveal interlocking crystals and occasional dark mica flakes.
Field identification & locations
Common in stream gravels, glacial deposits, beaches, and weathered granite terrains worldwide. Look for a coarse interlocking texture, lack of layering or fossils, and resistance to scratching by a steel knife.