sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on Mohs scale, white to clear color, vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage.
Formation & geological history
Formed through the mechanical weathering and prolonged aqueous transportation of quartz veins or parent rock, smoothing sharp edges over millions of years.
Uses & applications
Used primarily in landscaping, decorative crafts, and as a raw material for silicon and glass production.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Easily identified in the field by its high hardness (scratches glass) and smooth, rounded pebble morphology found in riverbeds and beaches.
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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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