mineral

Milky quartz-rich rock

Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and attached host material

AI-generated identification · may be incorrect

White to translucent, glassy-to-waxy luster; quartz hardness Mohs 7, no cleavage, conchoidal fracture, hexagonal crystal structure. The specimen appears massive and weathered rather than showing distinct crystals.

Identified August 10, 2026More mineral →

Explore Milky quartz-rich rock 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 hydrothermal fluids filling a vein or cavity in older host rock; the precise geological age cannot be determined from the image. Iron oxides produced the brown-yellow staining during later weathering.

Uses & applications

Used for construction aggregate, engineered stone, glass, ceramics, and silica products; attractive pieces are collected but are generally not jewelry grade unless transparent and well crystallized.

Geological facts

Milky appearance results from microscopic fluid inclusions, fractures, or dispersed impurities scattering light. Quartz is one of Earth’s most abundant and chemically durable minerals.

Field identification & locations

Common in quartz veins, pegmatites, granites, metamorphic rocks, and stream gravels worldwide. Identify it by its hardness, lack of cleavage, conchoidal fracture, and inability to scratch it with a steel nail; avoid confusing it with calcite, which is softer and cleaves readily.