igneous
Quartz-rich pegmatite (likely milky quartz with feldspar)
Granitic pegmatite, composed mainly of quartz (SiO₂) and feldspars
AI-generated identification · may be incorrectCoarse, pale cream to white, uneven granular texture with a dull to vitreous luster; quartz hardness 7 and feldspar about 6 on the Mohs scale. The photo does not show enough detail to confirm individual crystals or exact mineral proportions.
Identified More igneous →
Explore Quartz-rich pegmatite (likely milky quartz with feldspar) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Coarse, pale cream to white, uneven granular texture with a dull to vitreous luster; quartz hardness 7 and feldspar about 6 on the Mohs scale. The photo does not show enough detail to confirm individual crystals or exact mineral proportions.
Formation & geological history
Formed as a late-stage, silica-rich melt cooled slowly in veins or pockets within surrounding igneous rocks; pegmatites are generally Precambrian to recent, depending on the region.
Uses & applications
Quartz and feldspar are used in glass and ceramics; attractive pieces may be kept as teaching or display specimens. This rough, common-looking piece has little lapidary value.
Geological facts
Pegmatites can contain exceptionally large crystals and rare minerals, though no such crystals are evident here.
Field identification & locations
The pale color and coarse, irregular texture suggest quartz-feldspar rock; a fresh broken surface and hand lens would help distinguish it from massive quartz or limestone. Pegmatites occur worldwide in granitic terrains.
