mineral
Quartz Pebble
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale. Colors vary from translucent white, grey, smoky, to clear. Luster is vitreous (glassy). Crystal structure is trigonal. Conchoidal fracture with no true cleavage. Specific gravity is approximately 2.65.
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Physical properties
Hardness of 7 on the Mohs scale. Colors vary from translucent white, grey, smoky, to clear. Luster is vitreous (glassy). Crystal structure is trigonal. Conchoidal fracture with no true cleavage. Specific gravity is approximately 2.65.
Formation & geological history
Forms in a wide variety of geological environments, commonly precipitating from hydrothermal veins, or persisting as detrital grains in sedimentary rocks due to its extreme resistance to weathering.
Uses & applications
Used in the manufacture of glass, electronics, oscillators, abrasives, and as ornamental landscaping stones or polished gemstones.
Geological facts
Quartz is one of the most abundant minerals found in the Earth's continental crust and is exceptionally resistant to both mechanical and chemical weathering.
Field identification & locations
Easily identified by its high hardness (scratches glass), conchoidal fracture, and lack of cleavage. Found worldwide in riverbeds, beaches, and various rock formations.
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