mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to translucent, with a vitreous to dull luster and no cleavage; hardness 7 on the Mohs scale. The specimen appears massive rather than showing distinct crystals; specific gravity is about 2.65.

Identified September 24, 2026More mineral →

Explore Milky quartz in the encyclopedia →

Identify your own rocks.

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

App Store Google Play

Physical properties

White to translucent, with a vitreous to dull luster and no cleavage; hardness 7 on the Mohs scale. The specimen appears massive rather than showing distinct crystals; specific gravity is about 2.65.

Formation & geological history

Forms when silica-rich fluids crystallize in veins or cavities, and also occurs in igneous and metamorphic rocks. Quartz is common across many geological ages; age cannot be determined from the image.

Uses & applications

Used in glassmaking, electronics, and as a decorative or collecting specimen; this rough piece is not gem-quality.

Geological facts

Quartz is one of Earth’s most abundant minerals and commonly develops conchoidal fracture rather than cleavage.

Field identification & locations

The opaque white color and irregular, glassy-looking broken surfaces are consistent with milky quartz. It occurs worldwide, often in veins and gravel; confirm with a scratch test against glass, as quartz can scratch it.