igneous
Likely weathered granite or pegmatitic rock
Granite/pegmatite; primarily quartz (SiO₂), feldspar, and mica
AI-generated identification · may be incorrectCoarse, irregularly interlocking grains with pale pink/tan feldspar, whitish quartz, and dark mica or amphibole; vitreous to pearly luster. Typical hardness is about 6–7 Mohs, with no obvious cleavage as a whole rock and specific gravity around 2.6–2.7.
Identified More igneous →
Explore Likely weathered granite or pegmatitic rock in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse, irregularly interlocking grains with pale pink/tan feldspar, whitish quartz, and dark mica or amphibole; vitreous to pearly luster. Typical hardness is about 6–7 Mohs, with no obvious cleavage as a whole rock and specific gravity around 2.6–2.7.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing visible crystals to grow; likely Precambrian to Mesozoic depending on locality. Surface weathering may have rounded and stained the specimen.
Uses & applications
Used widely as building stone, countertops, monuments, aggregate, and decorative stone; small pieces are mainly teaching or collector specimens.
Geological facts
The pink coloration commonly comes from potassium feldspar, while dark flakes may be biotite mica. The photograph is insufficient to distinguish ordinary granite from a coarse pegmatite confidently.
Field identification & locations
Look for visible quartz, feldspar, and mica grains in a speckled texture; a steel nail should not scratch fresh quartz or feldspar. Common worldwide, especially in continental mountain belts and exposed plutons.
