sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7; vitreous luster; colorless to white or pale yellow; trigonal crystal system; conchoidal fracture with no cleavage.
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Physical properties
Mohs hardness of 7; vitreous luster; colorless to white or pale yellow; trigonal crystal system; conchoidal fracture with no cleavage.
Formation & geological history
Formed through the mechanical weathering and prolonged aqueous transportation of parent quartz veins or pegmatites.
Uses & applications
Used in landscaping, decorative aggregates, abrasives, and sometimes tumbled for lapidary crafts.
Geological facts
Quartz is one of the most abundant and chemically resistant minerals on Earth's continental crust.
Field identification & locations
Identify by its extreme hardness which scratches glass and lack of reactivity to dilute hydrochloric acid; found globally in rivers and beaches.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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