mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂), likely massive milky quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to cream, translucent to opaque, vitreous-to-waxy luster, and conchoidal fracture. Trigonal crystal structure, though individual crystals are not visible; no cleavage; specific gravity about 2.65.

Identified September 15, 2026More mineral →

Explore Tumbled 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

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; the cloudy appearance comes from microscopic fluid inclusions or defects. Quartz is common throughout Earth’s geologic history, including modern deposits.

Uses & applications

Used for ornamental stones, carvings, countertops, glass, ceramics, electronics, and silica products; attractive pieces are sold as inexpensive polished stones.

Geological facts

The rounded shape and smooth surface indicate human tumbling and polishing rather than natural weathering. It may occasionally contain faint inclusions of feldspar or iron staining, but the image is insufficient for precise locality identification.

Field identification & locations

Identify by its glassy/waxy appearance, lack of cleavage, cool feel, and ability to scratch ordinary glass; a steel knife should not scratch it. Common worldwide, especially in hydrothermal veins and pegmatites.