sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, colors vary from clear and white to grayish or yellowish, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale, colors vary from clear and white to grayish or yellowish, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65
Formation & geological history
Formed through the weathering and erosion of parent rocks containing quartz veins or pegmatites, followed by transportation and rounding in aquatic or aeolian environments over millions of years
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacture, and aggregate in construction
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering
Field identification & locations
Commonly found in stream beds, beaches, and conglomerate sedimentary rocks; identified by its high hardness (scratches glass) and lack of cleavage
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Other sedimentary specimens
Sandstone or Siltstone
Arenite (if sandstone)
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
fossil
Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
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