sedimentary
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to greasy luster, white to translucent color, conchoidal fracture with no cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to greasy luster, white to translucent color, conchoidal fracture with no cleavage.
Formation & geological history
Formed through intense weathering and aqueous transport of parent rocks, enduring persistent erosion in riverbeds or marine environments.
Uses & applications
Used in landscaping, construction aggregates, glass manufacturing, and raw material for silicon production.
Geological facts
Quartz is one of the most abundant and durable minerals on Earth's continental crust, surviving multiple cycles of erosion.
Field identification & locations
Easily identified by its high hardness (scratches glass) and smooth, rounded shape found in stream gravels and beaches worldwide.
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Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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