sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white to light brown color, vitreous luster, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, white to light brown color, vitreous luster, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Formed through the weathering and prolonged aqueous transportation of parent quartz veins or granitic rocks over millions of years.
Uses & applications
Used in landscaping, decorative stone, and as a raw material for silicon and glass production.
Geological facts
Quartz is one of the most abundant and chemically resistant minerals on Earth's surface, allowing pebbles to survive endless cycles of erosion.
Field identification & locations
Found abundantly in riverbeds, beaches, and alluvial gravels worldwide; identified by its high hardness which scratches glass.
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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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