sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white to translucent gray in color, with a vitreous to greasy luster and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically white to translucent gray in color, with a vitreous to greasy luster and conchoidal fracture.
Formation & geological history
Formed through the physical weathering and aqueous transportation of larger quartz-bearing parent rocks over extended geological periods.
Uses & applications
Used in landscaping, decorative aggregates, and occasionally as raw material for glass manufacturing.
Geological facts
Quartz is one of the most abundant and chemically resistant minerals in Earth's continental crust.
Field identification & locations
Identified by its high hardness, lack of cleavage, and resistance to acid; commonly found in riverbeds and beaches worldwide.
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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
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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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