mineral

Milky quartz

Quartz (SiO₂), typically massive rather than visibly crystalline

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a vitreous-to-greasy luster and no cleavage. It has a trigonal crystal structure, though this piece appears granular or massive.

Identified October 13, 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

Hardness 7 Mohs; white to translucent with a vitreous-to-greasy luster and no cleavage. It has a trigonal crystal structure, though this piece appears granular or massive.

Formation & geological history

Forms when silica-rich fluids crystallize in fractures and veins, or during cooling of silica-rich magma; quartz is common in rocks of many geological ages.

Uses & applications

Used in glassmaking, electronics, and decorative stone; small rough pieces are mainly collected or used for crafts.

Geological facts

Quartz is one of Earth’s most abundant minerals and resists weathering, so it commonly persists in soils and stream sediments.

Field identification & locations

The pale, glassy appearance and hardness are consistent with milky quartz; a scratch test against glass can help distinguish it from softer minerals. It occurs worldwide, especially in quartz veins and granitic terrains.