sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, white to translucent color, vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Mohs hardness of 7, white to translucent color, vitreous luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms through the weathering and water-transport of quartz-bearing rocks, smoothed into rounded pebbles over long periods in fluvial or marine environments.
Uses & applications
Used in landscaping, decorative gravel, abrasive manufacturing, and as a raw material for glass and silicon production.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and possesses strong piezoelectric properties.
Field identification & locations
Identified by its high hardness (scratches glass), lack of cleavage, and smooth water-worn shape; found worldwide in riverbeds and beaches.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
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Shale
Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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