sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, hexagonal crystal system, and lacks cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or colorless, vitreous luster, hexagonal crystal system, and lacks cleavage.
Formation & geological history
Formed through the weathering, erosion, and accumulation of quartz-rich rocks like granite over millions of years.
Uses & applications
Widely used in glass manufacturing, construction as a concrete component, sandblasting, and electronics.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and resists weathering exceptionally well.
Field identification & locations
Found globally in deserts, riverbeds, and beaches; identified by its high hardness, gritty feel, and lack of acid reaction.
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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
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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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