sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, commonly white or grey with a vitreous luster and conchoidal fracture.
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Physical properties
Hardness of 7 on Mohs scale, commonly white or grey with a vitreous luster and conchoidal fracture.
Formation & geological history
Formed through the physical weathering and water-transport rounding of larger quartz veins or rocks in river or marine environments.
Uses & applications
Used in landscaping, decorative stone, filtration beds, and as a raw material for silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Identified by its high hardness (scratches glass) and smooth, water-worn shape found abundantly in riverbeds and beaches.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
Calcareous concretion; exact fossil and host-rock composition are not identifiable from the image
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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
Arenite
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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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