sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale; white, beige, or translucent 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, beige, or translucent color; vitreous luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65
Formation & geological history
Formed through intense physical and chemical weathering of primary igneous or metamorphic rocks, subsequently transported by water and rounded by abrasion in riverbeds or marine environments over millions of years
Uses & applications
Used in landscaping, decorative stone, abrasive manufacturing, and as a raw material for glass and silicon production
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
Commonly found in stream beds, beaches, and conglomerated sedimentary rocks worldwide; identified easily by its high hardness (scratches glass) and conchoidal fracture
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Quartz pebble
Silicon dioxide (SiO2)
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