mineral
Quartz Pebble
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness 7, vitreous to waxy luster, conchoidal fracture, and typically white to off-white or yellowish due to iron staining.
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Physical properties
Mohs hardness 7, vitreous to waxy luster, conchoidal fracture, and typically white to off-white or yellowish due to iron staining.
Formation & geological history
Formed through hydrothermal veins or crystallizing igneous magma, subsequently weathered, eroded, and rounded by fluvial processes.
Uses & applications
Commonly used in glassmaking, construction aggregate, abrasives, and landscaping.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and is exceptionally resistant to mechanical and chemical weathering.
Field identification & locations
Identified by its high hardness (scratches glass and steel) and lack of cleavage; found ubiquitously in riverbeds, beaches, and gravel 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
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic
Granite
Granite (Phaneritic intrusive igneous rock)
igneous