sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to translucent color, vitreous luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, white to translucent color, vitreous luster, trigonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Formed via the accumulation of weathered quartz grains deposited in rivers or beaches, then smoothed by water abrasion over thousands to millions of years.
Uses & applications
Used in landscaping, decorative paths, abrasive manufacturing, and as a raw material for glass and electronics.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and is exceptionally resistant to chemical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass) and smooth, rounded water-worn shape. Found worldwide in stream beds, beaches, and gravel deposits.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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