igneous
Pink granite
Granite, chiefly quartz, potassium feldspar, and plagioclase, with minor dark minerals such as biotite
AI-generated identification · may be incorrectCoarse-grained, pink and gray, with a granular texture and no obvious layering; minerals are mostly Mohs 6–7 (biotite about 2.5–3). Granite has interlocking crystals, no consistent cleavage as a rock, and typical specific gravity around 2.6–2.7.
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Physical properties
Coarse-grained, pink and gray, with a granular texture and no obvious layering; minerals are mostly Mohs 6–7 (biotite about 2.5–3). Granite has interlocking crystals, no consistent cleavage as a rock, and typical specific gravity around 2.6–2.7.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing visible crystals to grow. Granite occurs in continental crust spanning a wide range of geological ages.
Uses & applications
Used as dimension stone, paving and building aggregate, countertops, monuments, and decorative stone; this rough specimen is mainly of collecting interest.
Geological facts
Pink color commonly comes from potassium feldspar, while quartz appears gray or translucent and biotite forms dark flecks.
Field identification & locations
The image shows a coarse, pink, interlocking crystalline rock consistent with granite. Granite is common in continental mountain belts and ancient shields; confirm by spotting hard quartz and feldspar crystals rather than a uniform fine-grained texture.
