mineral
Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white, clear, or pinkish/brownish due to impurities, vitreous (glassy) luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white, clear, or pinkish/brownish due to impurities, vitreous (glassy) luster, trigonal crystal system, conchoidal fracture, and specific gravity around 2.65.
Formation & geological history
Forms in a wide variety of geological environments, commonly crystallizing from silica-rich hydrothermal veins and magma, or as a primary component of igneous, metamorphic, and sedimentary rocks.
Uses & applications
Used widely in glassmaking, electronics, oscillators, abrasives, gemstones, and construction materials.
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 in response to mechanical stress.
Field identification & locations
Identified easily by its high hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found worldwide in almost every geological setting.
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Other mineral specimens
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Soil with Mineral Detritus and Quartz Fragments
Regolith / Silicate Mineral Aggregate
sedimentary
Limonite / Goethite (Iron Ore Mineral nodule)
FeO(OH)·nH2O / FeO(OH)
mineral
Septarian Pebble
Septarian nodule / Concretion
sedimentary
Schist
Schist
Metamorphic
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral