mineral

Quartz (Tumbled)

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale, typically orange-brown to translucent in this specimen, vitreous luster, trigonal crystal system, no cleavage, specific gravity around 2.65.

Identified August 4, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale, typically orange-brown to translucent in this specimen, vitreous luster, trigonal crystal system, no cleavage, specific gravity around 2.65.

Formation & geological history

Formed in various geological environments, often crystallizing from silica-rich hydrothermal veins or accumulating as weathered clastic grains in sedimentary deposits.

Uses & applications

Used in jewelry, tumbling, decorative items, electronics, and glassmaking.

Geological facts

Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.

Field identification & locations

Easily identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Commonly found worldwide in riverbeds, beaches, and pegmatites.