sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or brown due to iron staining, vitreous luster, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or brown due to iron staining, vitreous luster, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed through the mechanical weathering and transport of quartz-rich rocks, highly resistant to chemical and physical breakdown.
Uses & applications
Used in landscaping, construction aggregate, glassmaking, and raw material for silica.
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust.
Field identification & locations
Found globally in riverbeds, beaches, and sedimentary conglomerates. Identified by its high hardness and resistance to scratching by steel.
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Sandstone or Siltstone
Arenite (if sandstone)
Sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
sedimentary