sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, yellowish-brown color due to iron staining, vitreous luster, and conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, yellowish-brown color due to iron staining, vitreous luster, and conchoidal fracture.
Formation & geological history
Formed through the mechanical weathering and water transport of larger quartz veins or rocks, resulting in smooth, rounded edges.
Uses & applications
Used in landscaping, decorative gravel, and occasionally tumbled for lapidary crafts.
Geological facts
Quartz is one of the most abundant and chemically resistant minerals on Earth's surface.
Field identification & locations
Found worldwide in stream beds, beaches, and alluvial deposits; identified by its high hardness and lack of cleavage.
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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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Shale
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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