igneous
Weathered granitic rock fragment
Likely granite or granodiorite, chiefly quartz, feldspar, and minor biotite/hornblende
AI-generated identification · may be incorrectPale pink-tan, coarse crystalline texture with visible light minerals and dark inclusions; typically Mohs 6–7, vitreous to dull luster, massive structure, and poor cleavage as a whole. The image is somewhat low-resolution, so exact identification is limited.
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Physical properties
Pale pink-tan, coarse crystalline texture with visible light minerals and dark inclusions; typically Mohs 6–7, vitreous to dull luster, massive structure, and poor cleavage as a whole. The image is somewhat low-resolution, so exact identification is limited.
Formation & geological history
Formed by slow cooling of silica-rich magma deep in the crust, commonly during Precambrian to Phanerozoic continental intrusive events; surface weathering produced the rounded, stained appearance.
Uses & applications
Used as crushed stone, aggregate, dimension stone, monuments, and decorative slabs; attractive pieces may be collected, though this fragment has little gem value.
Geological facts
Pink coloration generally comes from potassium feldspar, while dark specks may be biotite or amphibole. Granitic fragments commonly weather to rounded surfaces and rusty iron-oxide stains.
Field identification & locations
Look for interlocking quartz and feldspar grains, unlike sandstone’s cemented grains or porcelain-like ceramic. Common worldwide, especially in continental shields, mountain batholiths, and glacial deposits.
