sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, waxy to vitreous luster, white to translucent color with yellow staining, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, waxy to vitreous luster, white to translucent color with yellow staining, and conchoidal fracture.
Formation & geological history
Formed through the mechanical weathering and water transport of quartz veins or larger rocks, accumulating in riverbeds or beaches over geological timescales.
Uses & applications
Used in landscaping, decorative gravel, tumbling, and occasionally as a raw material for silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's surface, resisting chemical weathering better than most other minerals.
Field identification & locations
Easily identified by its high hardness (scratches glass) and resistance to acid; commonly found in gravel bars, riverbeds, and coastal beaches worldwide.
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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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