sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, white to gray color, vitreous luster, conchoidal fracture, trigonal crystal system.
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Physical properties
Hardness of 7 on Mohs scale, white to gray color, vitreous luster, conchoidal fracture, trigonal crystal system.
Formation & geological history
Formed through mechanical weathering and aqueous transport of primary igneous or metamorphic quartz veins over millions of years.
Uses & applications
Used in landscaping, decorative aggregates, and as raw material for glass manufacturing.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's continental crust, highly resistant to both chemical and physical weathering.
Field identification & locations
Identified by high hardness that scratches glass and lack of cleavage; commonly found in riverbeds, beaches, and conglomeratic sedimentary rock.
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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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