mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

AI-generated identification · may be incorrect

Hardness: 7 on Mohs scale; Color: White to off-white/cream; Luster: Vitreous to waxy (when water-worn); Crystal structure: Trigonal/Hexagonal (though not visible in tumbled state); Cleavage: None/Conchoidal fracture; Specific gravity: 2.65.

Hardness: 7 on Mohs scale
Color: White to off-white/cream
Luster: Vitreous to waxy (when water-worn)

Identified June 25, 2026More mineral →

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Physical properties

Formation & geological history

Formed from silica-rich hydrothermal veins or within igneous and metamorphic rocks. This specific specimen has been rounded and smoothed by fluvial or marine erosion over thousands of years.

Uses & applications

Used in glass making, electronics, and as an abrasive. Smooth pebbles are common in decorative landscaping, aquariums, and as pocket stones for collectors.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust. White quartz is often called 'Milk Quartz' due to microscopic fluid inclusions trapped during crystal growth.