mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Hardness of 7 on the Mohs scale. Colors vary from white, colorless, to yellow, pink, or brownish staining from iron oxides. Vitreous luster. Trigonal crystal system, often massive or rounded in pebble form. Conchoidal fracture, no true cleavage. Specific gravity is approximately 2.65.

Identified August 4, 2026More mineral →

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Physical properties

Formation & geological history

Forms in virtually all geological environments - igneous, metamorphic, and sedimentary. Often survives weathering and erosion due to its extreme hardness and chemical resistance, forming smooth pebbles in rivers and beaches.

Uses & applications

Used in glassmaking, electronics, abrasives, gemstones, ornamental objects, and construction materials.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust. Its piezoelectric properties make it essential for watches and electronic oscillators.

Field identification & locations

Can be identified by its high hardness (scratches glass easily), lack of cleavage, and conchoidal fracture. Found worldwide in riverbeds, beaches, and various rock formations.