sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white or translucent, vitreous to greasy luster, hexagonal crystal system when un-weathered, conchoidal fracture, specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or translucent, vitreous to greasy luster, hexagonal crystal system when un-weathered, conchoidal fracture, specific gravity around 2.65.
Formation & geological history
Formed through the mechanical weathering and water transport of quartz veins or parent rock, resulting in a rounded pebble shape found in riverbeds, beaches, and alluvial deposits.
Uses & applications
Used in landscaping, decorative stone, abrasive manufacturing, and as tumbled stones for lapidary arts.
Geological facts
Quartz is one of the most abundant and durable minerals in the Earth's continental crust, surviving weathering processes that break down most other minerals.
Field identification & locations
Easily identified by its high hardness (scratches glass) and resistance to weathering. Commonly found worldwide in streams, beaches, and gravel bars.
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Sandstone or Siltstone
Arenite (if sandstone)
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Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Fossiliferous Concretion
Septarian Concretion containing Brachiopods/Crinoids
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Generic Pebble / Rock Fragment
Lithic fragment / Weathered rock
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Sedimentary Sandstone
Arenite (Sedimentary Rock)
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Banded Siltstone / Mudstone Pebble
Siltstone / Argillite
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