sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, white or translucent color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, white or translucent color, vitreous luster, trigonal crystal system, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed through the mechanical weathering and water transport of larger quartz-bearing rocks, smoothing into pebbles over long periods in riverbeds or marine environments.
Uses & applications
Used in landscaping, decorative ground cover, aquarium substrates, and occasionally in aggregate production for construction.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and smooth, rounded shape found commonly in stream beds and beaches.
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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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