
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs 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.