sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, white to translucent color, vitreous luster, trigonal crystal system, and no true cleavage.
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Physical properties
Hardness of 7 on Mohs scale, white to translucent color, vitreous luster, trigonal crystal system, and no true cleavage.
Formation & geological history
Formed through the weathering and water-transport of quartz veins or parent rocks, often accumulating in riverbeds and beaches over millions of years.
Uses & applications
Used in landscaping, decorative stone, glass manufacturing, and abrasive products.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in stream gravels and sedimentary deposits.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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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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