mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous-to-waxy luster, typically massive rather than visibly crystalline; Mohs hardness 7, no cleavage, conchoidal fracture, specific gravity about 2.65. The rounded edges indicate tumbling or polishing.

Identified August 27, 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 fill fractures and cavities, crystallizing over geological timescales from Precambrian to recent. Milky appearance results from microscopic fluid inclusions, fractures, or impurities.

Uses & applications

Used as a lapidary stone, ornamental material, and inexpensive jewelry or décor; quartz also has major industrial uses in glass, ceramics, electronics, and engineered stone.

Geological facts

Quartz is one of Earth’s most abundant minerals and is chemically resistant, though it can scratch ordinary steel and glass. This specimen’s smooth triangular form is likely human-shaped rather than a natural crystal habit.

Field identification & locations

Identify it by its white translucency, hardness, lack of cleavage, and glassy fracture; common sources include Brazil, Madagascar, the United States, and worldwide quartz veins. A small tumbled piece typically sells for $1–$10; unusual quality or provenance may reach $10–$30.