igneous
Quartz-rich pegmatitic rock, possibly rose quartz with mica
Granitic pegmatite; predominantly quartz (SiO₂), with feldspar and mica
AI-generated identification · may be incorrectHardness about 6–7 Mohs; pink, white, gray, and brown mottling; vitreous to pearly luster; interlocking coarse crystals with irregular fracture and weak cleavage from feldspar/mica. The image suggests quartz–feldspar material, though exact identification requires testing.
Identified More igneous →
Explore Quartz-rich pegmatitic rock, possibly rose quartz with mica in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness about 6–7 Mohs; pink, white, gray, and brown mottling; vitreous to pearly luster; interlocking coarse crystals with irregular fracture and weak cleavage from feldspar/mica. The image suggests quartz–feldspar material, though exact identification requires testing.
Formation & geological history
Likely formed as a coarse-grained igneous pegmatite from the final, volatile-rich melt of a granite intrusion, generally during Precambrian to Phanerozoic continental-crust events.
Uses & applications
Used mainly as a collector specimen; quartz and feldspar pegmatites can supply silica, feldspar, mica, lithium, and gemstones. Attractive polished pieces may be used decoratively.
Geological facts
Pegmatites commonly contain exceptionally large crystals and rare minerals. Pink coloration may reflect rose quartz, iron staining, or pink feldspar rather than a single mineral.
Field identification & locations
Look for very coarse crystal grains, glassy quartz that does not scratch with a steel knife, and softer feldspar or mica. Common in granite terrains and pegmatite districts worldwide; acid, streak, and hardness tests would improve identification.
