mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

AI-generated identification · may be incorrect

Hardness 7 Mohs; white to translucent with a vitreous-to-waxy luster, massive granular texture, and no obvious cleavage. Its blocky rounded shape and surface appear mechanically tumbled or naturally water-worn.

Identified August 19, 2026More mineral →

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Physical properties

Formation & geological history

Quartz crystallizes from silica-rich igneous and hydrothermal fluids, or precipitates in sedimentary and metamorphic settings; individual pieces may be far older than their host rock, from Precambrian to younger ages. This specimen was likely shaped by tumbling.

Uses & applications

Used for glass, ceramics, abrasives, engineered stone, and electronics; attractive pieces are sold as inexpensive decorative or metaphysical specimens.

Geological facts

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

Field identification & locations

Identify it by its glassy/waxy appearance, lack of cleavage, white translucency, and ability to scratch ordinary glass; a steel blade generally will not scratch it. Common worldwide, especially in veins, pegmatites, and quartz-rich gravels.