mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Hardness of 7 on the Mohs scale. Off-white to beige color, dull to vitreous luster, trigonal crystal structure system, conchoidal fracture, and lack of cleavage.

Identified July 25, 2026More mineral →

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Physical properties

Hardness of 7 on the Mohs scale. Off-white to beige color, dull to vitreous luster, trigonal crystal structure system, conchoidal fracture, and lack of cleavage.

Formation & geological history

Formed through crystallisation in igneous, metamorphic, or hydrothermal environments. Weathered and rounded over time by water or atmospheric transport.

Uses & applications

Commonly used in landscaping, gravel, construction aggregate, glassmaking, and decorative stone collecting.

Geological facts

Quartz is one of the most abundant minerals in the Earth's continental crust and is resistant to both chemical and mechanical weathering.

Field identification & locations

Identified by its ability to scratch glass (Mohs 7), lack of cleavage, and light tan/white coloration. Found globally in riverbeds, beaches, and soil deposits.