igneous
Pink granite
Granitic rock, mainly quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse-grained, pink-and-gray, with a generally uneven granular texture and vitreous-to-dull luster. Typical hardness is about 6–7 Mohs; quartz is hard and feldspar commonly shows cleavage, while the specimen appears weathered and rounded.
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Physical properties
Coarse-grained, pink-and-gray, with a generally uneven granular texture and vitreous-to-dull luster. Typical hardness is about 6–7 Mohs; quartz is hard and feldspar commonly shows cleavage, while the specimen appears weathered and rounded.
Formation & geological history
A felsic intrusive igneous rock that crystallized slowly from silica-rich magma deep underground, commonly during Precambrian to younger continental-crust events. Uplift and weathering produced the rounded surface.
Uses & applications
Widely used as dimension stone, countertops, monuments, paving, aggregate, and decorative stone; ordinary hand specimens have modest collecting value.
Geological facts
The pink color usually comes from potassium feldspar, gray translucent grains from quartz, and dark flecks from biotite or hornblende. Exact identification would benefit from a fresh broken surface or thin section.
Field identification & locations
Look for interlocking visible grains of pink feldspar, gray quartz, and black mica, with no layering or vesicles; it commonly occurs in continental plutons, mountain ranges, and glacial deposits. Estimated value: $2–$15 for a common hand specimen, more if unusually attractive or locality-labeled.
