mineral
Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or stained with iron oxides (brown/yellow), vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or stained with iron oxides (brown/yellow), vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments, most commonly as a primary mineral in felsic igneous rocks like granite and pegmatites, as well as in hydrothermal veins and sedimentary environments.
Uses & applications
Used extensively in electronics, glass manufacturing, abrasives, gemstones, and ornamental carvings.
Geological facts
Quartz is one of the most abundant and widely distributed minerals on Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electric charge under mechanical stress.
Field identification & locations
Easily identifiable in the field by its distinctive conchoidal fracture, lack of cleavage, and ability to scratch glass due to its hardness of 7.
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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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Schist
Schist
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Septarian Pebble
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sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
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