sedimentary
Quartz pebble
Silicon dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or greyish, 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 greyish, vitreous luster, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed by weathering and erosion of quartz-bearing rocks, transported by water and wind, and rounded into pebbles in river or beach environments.
Uses & applications
Used in landscaping, construction aggregate, decorative stone, and as a raw material for glass manufacturing and silicon production.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and is exceptionally resistant to both chemical and physical weathering.
Field identification & locations
Identified by its high hardness (scratches glass), lack of cleavage, and glassy luster. Commonly found in river beds, beaches, and conglomeratic rock formations.
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Sandstone or Siltstone
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Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
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Banded Siltstone / Mudstone Pebble
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