
mineral
Quartz pebble
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or translucent with a vitreous to greasy luster. No cleavage, conchoidal fracture.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or translucent with a vitreous to greasy luster. No cleavage, conchoidal fracture.
Formation & geological history
Formed through weathering and prolonged water abrasion (river or beach tumbling) of quartz-bearing rocks over thousands to millions of years.
Uses & applications
Commonly used in landscaping, decorative gravel, tumbling, and as a natural polished specimen for collectors.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass) and smooth, water-worn shape. Found globally in riverbeds, beaches, and alluvial deposits.
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Other mineral specimens
Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Septarian Pebble
Septarian nodule / Concretion
sedimentary