mineral
Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, typically white or transparent to translucent, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or transparent to translucent, vitreous to greasy luster, trigonal crystal system, conchoidal fracture, specific gravity of 2.65.
Formation & geological history
Forms in a wide variety of geological environments, including igneous, metamorphic, and sedimentary rocks. Often crystallizes from silica-rich hydrothermal solutions or magma.
Uses & applications
Used in electronics, oscillators, glassmaking, abrasives, and as a semi-precious gemstone in jewelry.
Geological facts
Quartz is one of the most abundant and widely distributed minerals found on Earth's continental crust. It exhibits piezoelectric properties, meaning it can generate an electrical charge in response to applied mechanical stress.
Field identification & locations
Easily identified by its hardness (scratches glass), lack of cleavage, and conchoidal fracture. Found globally 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