igneous
Weathered granite or granitic pegmatite fragment
Granite; chiefly quartz (SiO₂), feldspar, and mica, possibly iron-oxide alteration
AI-generated identification · may be incorrectCoarse, irregular crystalline texture with pale pink/tan feldspar, whitish quartz, and darker mica or oxidized minerals; typically Mohs 6–7, vitreous to pearly luster, no obvious cleavage as a whole, and specific gravity about 2.6–2.7.
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Physical properties
Coarse, irregular crystalline texture with pale pink/tan feldspar, whitish quartz, and darker mica or oxidized minerals; typically Mohs 6–7, vitreous to pearly luster, no obvious cleavage as a whole, and specific gravity about 2.6–2.7.
Formation & geological history
Formed by slow cooling of silica-rich magma deep in the crust, commonly during Precambrian to younger continental plutonism; the rough surface reflects weathering or mineral disaggregation.
Uses & applications
Used widely as building stone, aggregate, paving, monuments, and countertops; this small fragment has negligible jewelry or commercial value.
Geological facts
Granite is a rock rather than a single mineral, and its visible interlocking crystals indicate intrusive cooling. The photograph is too blurred for confident identification of a specific variety.
Field identification & locations
Look for interlocking pink/white crystals, black mica or amphibole, hardness sufficient to scratch glass, and no bubbling with dilute acid. Common worldwide, especially in continental mountain belts and exposed plutons.
