sedimentary
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellowish-brown color from iron staining, vitreous luster, microcrystalline or trigonal crystal structure, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, yellowish-brown color from iron staining, vitreous luster, microcrystalline or trigonal crystal structure, conchoidal fracture with no true cleavage.
Formation & geological history
Formed through intense weathering and aqueous transport of quartz veins or parent rock, rounding into a pebble shape over millions of years.
Uses & applications
Used in landscaping, decorative aggregates, abrasives, and as a raw material for silicon production.
Geological facts
Quartz is one of the most abundant minerals on Earth's continental crust and displays piezoelectric properties.
Field identification & locations
Easily identified in the field by its high hardness, smooth water-worn exterior, and inability to be scratched by a steel knife. Found globally in riverbeds and beaches.
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Sandstone or Siltstone
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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