igneous
Granite pebble
Granite, chiefly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, speckled white-gray rock with dark mineral grains; likely Mohs hardness 6–7, vitreous quartz and feldspar luster, and no regular cleavage as a whole rock. The image is too small to confirm mineral proportions or specific gravity.
Identified More igneous →
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Physical properties
Coarse-grained, speckled white-gray rock with dark mineral grains; likely Mohs hardness 6–7, vitreous quartz and feldspar luster, and no regular cleavage as a whole rock. The image is too small to confirm mineral proportions or specific gravity.
Formation & geological history
Intrusive igneous rock formed as magma cooled slowly underground, allowing visible crystals to grow. Granite occurs in continental crust of many ages.
Uses & applications
Granite is used for building stone, paving, countertops, and decorative aggregate; this small, weathered piece is mainly suitable for collecting.
Geological facts
Its pale grains are likely feldspar and quartz, while darker flecks may be biotite or amphibole; the specimen’s exact identity cannot be confirmed from the photograph alone.
Field identification & locations
A speckled, interlocking mixture of light and dark crystals is typical of granite. It is common in continental mountain belts and glacial or river deposits; a fresh broken surface helps distinguish its minerals.
