mineral

White quartz pebble (likely milky quartz)

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

Typically Mohs hardness 7, white to translucent, with a vitreous to waxy luster; lacks cleavage and has conchoidal fracture. The rounded shape indicates natural water wear or tumbling; surface details may reflect polishing.

Identified September 7, 2026More mineral →

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Physical properties

Formation & geological history

Formed when silica-rich fluids crystallized in veins or igneous/metamorphic rocks, commonly during Precambrian to younger geological events. It later weathered out and became rounded in sediment or by human tumbling.

Uses & applications

Used as aggregate, glass and ceramic feedstock, abrasives, and decorative stone; attractive pieces are used in crafts and inexpensive jewelry. This small specimen has modest collector value.

Geological facts

Milky color results from microscopic fluid inclusions, fractures, or impurities scattering light. Quartz is one of Earth’s most abundant and chemically resistant minerals.

Field identification & locations

Identify by its white translucent appearance, glassy edges, hardness sufficient to scratch ordinary glass, and absence of cleavage; calcite would be softer and react with acid. Common in quartz veins, river gravels, and beaches worldwide.