mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or grey, vitreous to dull luster, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or grey, vitreous to dull luster, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments, often weathering out of igneous and metamorphic rocks and becoming rounded into pebbles through fluvial or marine transport.
Uses & applications
Used in landscaping, decorative stone, abrasive manufacturing, and as a mineral specimen.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and is exceptionally resistant to both chemical and physical weathering.
Field identification & locations
Found worldwide in riverbeds, beaches, and glacial drift. Can be identified by its high hardness (scratches glass) and lack of cleavage.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral