igneous
Weathered granite-like rock fragments
Granite or granodiorite; chiefly quartz, feldspar, and biotite/hornblende
AI-generated identification · may be incorrectVisible coarse, speckled texture suggests interlocking crystals; likely Mohs hardness 6–7, with pale feldspar/quartz and dark mafic minerals, vitreous to dull luster, and no obvious cleavage as a whole rock. The image is low-resolution, so exact identification is uncertain.
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Physical properties
Visible coarse, speckled texture suggests interlocking crystals; likely Mohs hardness 6–7, with pale feldspar/quartz and dark mafic minerals, vitreous to dull luster, and no obvious cleavage as a whole rock. The image is low-resolution, so exact identification is uncertain.
Formation & geological history
Formed when silica-rich magma slowly crystallized underground, commonly during Precambrian to Phanerozoic continental mountain-building; surface weathering rounded and stained the fragments.
Uses & applications
Used as dimension stone, countertops, monuments, aggregate, and landscaping rock; attractive pieces may be collected but are generally low-value.
Geological facts
Granite commonly weathers into rounded “corestones” and sandy grus. Pink or cream areas are typically potassium feldspar, while dark flecks are biotite or hornblende.
Field identification & locations
Look for coarse interlocking grains, abundant light feldspar/quartz, and scattered dark minerals; a glassy streak-free appearance and hardness that can scratch glass support granite. Common worldwide, especially in continental shields and mountain belts.
