sedimentary
Quartz Pebbles
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and lack of cleavage. Colors range from translucent yellow-orange to white and pink due to iron oxide impurities.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, conchoidal fracture, and lack of cleavage. Colors range from translucent yellow-orange to white and pink due to iron oxide impurities.
Formation & geological history
Formed through the weathering and water-transport of quartz-rich parent rocks, becoming rounded pebbles over long periods in fluvial or marine environments.
Uses & applications
Used in landscaping, decorative stone, aquarium gravel, and as abrasive media.
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 smooth, water-worn tumbled shape found in riverbeds 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
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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