metamorphic

Milky quartz-rich rock, possibly quartzite

Quartz (SiO₂), likely in a quartzite or quartz-vein matrix

AI-generated identification · may be incorrect

White to translucent gray, vitreous to pearly luster, massive/granular texture, and no obvious cleavage; quartz hardness is Mohs 7, with specific gravity about 2.65. The rough, weathered surface and iron-stained patches suggest a natural quartz-bearing specimen.

Identified September 16, 2026More metamorphic →

Explore Milky quartz-rich rock, possibly quartzite in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Likely formed from silica-rich fluids filling a fracture as a quartz vein, or from metamorphism and recrystallization of sandstone into quartzite. The image alone cannot establish a geological age.

Uses & applications

Common quartz has uses in glass, ceramics, electronics, abrasives, and engineered stone; attractive pieces may be used as decorative specimens. This sample appears more suitable for casual collecting than jewelry.

Geological facts

Quartz commonly shows conchoidal fracture rather than cleavage and can scratch ordinary glass. Its cloudy appearance results from microscopic fluid inclusions, fractures, or mineral impurities.

Field identification & locations

Look for glass-scratching hardness, translucent edges, and irregular conchoidal fracture; quartzite typically has a sugary, interlocking granular texture, while a vein is more massive. Common worldwide, especially in hydrothermal veins and metamorphic terrains.