sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, colors vary from clear to white, grey, or brownish due to impurities; vitreous luster, conchoidal fracture, trigonal crystal system.
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Physical properties
Hardness of 7 on the Mohs scale, colors vary from clear to white, grey, or brownish due to impurities; vitreous luster, conchoidal fracture, trigonal crystal system.
Formation & geological history
Formed through the accumulation and weathering of silicate minerals in various geological environments, commonly rounded over long periods by water action in rivers or beaches.
Uses & applications
Used in landscaping, decorative gravel, tumbling, and as raw material for glass and silicon production.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Identified by its high hardness (scratches glass) and lack of cleavage; commonly found in riverbeds, beaches, and conglomeritic rock formations.
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Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
sedimentary
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
sedimentary