igneous
Pink feldspar–quartz rock, likely granite or pegmatite
Coarse-grained granitoid/pegmatite; chiefly potassium feldspar (orthoclase/microcline), quartz, and minor dark mica or amphibole
AI-generated identification · may be incorrectTypically pink, white, and gray with a granular texture; feldspar shows glassy to pearly luster and cleavage, quartz is glassy and lacks cleavage. Hardness is about 6–7 Mohs; specific gravity roughly 2.6–2.7. The photograph is insufficient to distinguish granite from pegmatite confidently.
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Physical properties
Typically pink, white, and gray with a granular texture; feldspar shows glassy to pearly luster and cleavage, quartz is glassy and lacks cleavage. Hardness is about 6–7 Mohs; specific gravity roughly 2.6–2.7. The photograph is insufficient to distinguish granite from pegmatite confidently.
Formation & geological history
Formed when silica-rich magma cooled slowly underground, allowing large crystals to grow; pegmatites commonly crystallized during late stages of Precambrian to Phanerozoic pluton formation.
Uses & applications
Used as dimension stone, countertops, aggregate, and decorative material; attractive feldspar-rich pieces are collected, though this specimen appears ordinary rather than gem quality.
Geological facts
Pink coloration commonly comes from potassium feldspar, while dark flakes may be biotite mica. Pegmatites can host tourmaline, beryl, lithium minerals, and other large crystals.
Field identification & locations
Identify by visible interlocking crystals, pink feldspar cleavage, white/gray quartz, and hardness sufficient to scratch glass. Common worldwide in continental mountain belts and exposed granitic plutons.
