mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale; white to clear color; vitreous luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
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Physical properties
Hardness of 7 on the Mohs scale; white to clear color; vitreous luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
Formation & geological history
Formed through the crystallization of silica-rich solutions or magma, often weathered out of parent rocks like granite or quartzite and rounded by stream or wave transport over millions of years.
Uses & applications
Used in landscaping, decorative stone, abrasives, and as raw material for glassmaking and electronics.
Geological facts
Quartz is one of the most abundant and durable minerals in Earth's continental crust, highly resistant to both chemical and mechanical weathering.
Field identification & locations
Found worldwide in riverbeds, beaches, and sedimentary deposits. Easily identified by its high hardness (scratches glass) and lack of cleavage.
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Arenite (SiO2 based)
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Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
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Septarian Pebble
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Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral