mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, translucent to transparent, vitreous luster, conchoidal fracture, trigonal crystal system, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, translucent to transparent, vitreous luster, conchoidal fracture, trigonal crystal system, specific gravity of 2.65.
Formation & geological history
Formed through crystallization from silicate melts or hydrothermal solutions, often weathering out of igneous and metamorphic rocks to be rounded by water transport in sedimentary environments.
Uses & applications
Used in landscaping, decorative items, glassmaking, electronics, and lapidary arts.
Geological facts
Quartz is one of the most abundant minerals in the Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge under mechanical stress.
Field identification & locations
Easily identified by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Commonly found in riverbeds, beaches, and glacial outwash.
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
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Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
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Schist
Schist
Metamorphic
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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