mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 7, vitreous to dull waxy luster, trigonal crystal system, conchoidal fracture, typically tan, white, or translucent.
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Physical properties
Mohs hardness 7, vitreous to dull waxy luster, trigonal crystal system, conchoidal fracture, typically tan, white, or translucent.
Formation & geological history
Formed through igneous or hydrothermal crystallization, subsequently eroded and rounded by fluvial or marine sediment transport.
Uses & applications
Commonly used as construction aggregate, landscaping gravel, abrasive grit, and silica source for glass manufacture.
Geological facts
Quartz is one of the most resistant common minerals to chemical and mechanical weathering, which allows small pebbles to survive extensive river transport.
Field identification & locations
Identified by hardness (scratches glass/steel), lack of true cleavage, and resistant, rounded pebble habit. Ubiquitous along riverbeds, beaches, and gravel paths.
