mineral

Tumbled white quartz

Quartz (silicon dioxide, SiO₂), likely milky quartz

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a vitreous-to-waxy luster and cloudy inclusions. Crystalline structure is trigonal, with no cleavage and conchoidal fracture; specific gravity about 2.65.

Identified August 15, 2026More mineral →

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Physical properties

Hardness 7 Mohs; white to translucent with a vitreous-to-waxy luster and cloudy inclusions. Crystalline structure is trigonal, with no cleavage and conchoidal fracture; specific gravity about 2.65.

Formation & geological history

Forms when silica-rich fluids crystallize in veins, cavities, and igneous or metamorphic rocks; milky appearance comes from microscopic fluid inclusions or fractures. The pictured piece is human-tumbled and has no determinable geological age.

Uses & applications

Used as a decorative stone, lapidary material, paper/glass filler, and silica source; attractive pieces may be sold as inexpensive worry stones or carvings.

Geological facts

Quartz is one of Earth’s most abundant minerals and is the defining component of many granites, sandstones, and quartz veins.

Field identification & locations

Identify by its glassy/waxy appearance, lack of cleavage, conchoidal fracture, and ability to scratch ordinary glass; a streak and hardness test can confirm it. Common worldwide, especially in hydrothermal veins and crystalline rocks.