mineral

Tumbled quartz

Quartz, silicon dioxide (SiO₂)

AI-generated identification · may be incorrect

White to translucent, vitreous luster, hardness 7 Mohs, no cleavage, conchoidal fracture, and trigonal crystal structure; the rounded shape indicates tumbling or water wear.

Identified September 17, 2026More mineral →

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Physical properties

White to translucent, vitreous luster, hardness 7 Mohs, no cleavage, conchoidal fracture, and trigonal crystal structure; the rounded shape indicates tumbling or water wear.

Formation & geological history

Quartz crystallizes from silica-rich igneous, metamorphic, and hydrothermal fluids; these specimens may be geologically ancient, commonly sourced from pegmatites, veins, or quartz-rich sediments.

Uses & applications

Used as a decorative/collectible stone, abrasive, glass and ceramic ingredient, and industrial silica source; this small tumbled piece has modest value.

Geological facts

Its cloudy appearance is caused by microscopic fluid inclusions, fractures, or mineral impurities. It may also be called milky quartz.

Field identification & locations

Identify it by its glassy luster, white translucency, lack of cleavage, and ability to scratch ordinary glass; common sources include Brazil, Madagascar, the United States, and worldwide quartz deposits.