mineral

Tumbled quartz-rich stone, possibly druzy quartz or quartzite

Quartz (SiO₂), likely in a quartzite or chalcedonic matrix

AI-generated identification · may be incorrect

Small rounded specimen with pale gray-beige color, translucent edges, and sparkling granular/crystalline areas. Quartz hardness is Mohs 7; vitreous to slightly sugary luster, no obvious cleavage, conchoidal fracture, and specific gravity about 2.65.

Identified August 24, 2026More mineral →

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Physical properties

Formation & geological history

Quartz formed from silica-rich fluids or recrystallized sandstone; quartzite develops during metamorphism. The specimen appears tumbled or naturally worn, so its precise geologic age and source cannot be determined visually.

Uses & applications

Used for glass, ceramics, abrasives, electronics, and construction aggregate; attractive pieces are sold as inexpensive lapidary or mineral specimens.

Geological facts

The glittering texture may represent tiny quartz crystal faces (druzy), though the photograph is insufficient to confirm a specific variety.

Field identification & locations

Test against glass: quartz should scratch it; it should not be scratched by a steel knife. Look for hexagonal crystal faces, conchoidal fracture, and absence of strong cleavage. Common worldwide, especially in Brazil, Madagascar, the United States, and quartzite terrains.