mineral

White quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky quartz

AI-generated identification · may be incorrect

White to translucent, vitreous-to-pearly luster with irregular intergrown crystals; Mohs hardness 7, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65.

Identified August 24, 2026More mineral →

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Physical properties

White to translucent, vitreous-to-pearly luster with irregular intergrown crystals; Mohs hardness 7, no cleavage, conchoidal fracture, trigonal crystal structure, and specific gravity about 2.65.

Formation & geological history

Crystallized from silica-rich hydrothermal fluids or cavities in igneous and metamorphic rocks; quartz formed throughout Earth’s history, commonly from Precambrian to recent deposits. The specimen appears natural but may have been broken from a larger cluster.

Uses & applications

Common quartz is used in glass, ceramics, abrasives, electronics, and engineered stone; attractive clusters are sold as decorative or educational specimens. It is generally not gem quality because of its opacity and irregular form.

Geological facts

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

Field identification & locations

Identify by its hardness, lack of cleavage, glassy luster, and inability to scratch it with a steel knife; it should scratch ordinary glass. Common worldwide, including Brazil, Arkansas, Madagascar, and Alpine hydrothermal veins.