Rock Identifier
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral
mineral

Quartz Pebble

Silicon Dioxide (SiO2)

AI-generated identification · may be incorrect

Mohs hardness of 7, vitreous to waxy luster, trigonal crystal structure, conchoidal fracture, and yellowish-tan to translucent color.

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Physical properties

Mohs hardness of 7, vitreous to waxy luster, trigonal crystal structure, conchoidal fracture, and yellowish-tan to translucent color.

Formation & geological history

Formed through igneous or hydrothermal processes, later eroded, transported, and water-worn into a rounded pebble in a fluvial or sedimentary environment.

Uses & applications

Used widely in abrasives, glassmaking, construction aggregates, and semi-precious tumbled stones.

Geological facts

Quartz is the second most abundant mineral in Earth's continental crust and is exceptionally resistant to mechanical and chemical weathering.

Field identification & locations

Identified by its ability to scratch glass (hardness 7), lack of cleavage, and translucent waxy appearance; commonly found in riverbeds, beaches, and gravel beds worldwide.