mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale; white to translucent with yellowish-orange iron oxide staining; vitreous to greasy 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 to translucent with yellowish-orange iron oxide staining; vitreous to greasy luster; trigonal crystal system; conchoidal fracture with no true cleavage; specific gravity of 2.65.
Formation & geological history
Formed in a wide variety of geological environments, commonly precipitating from hydrothermal veins, pegmatites, and sedimentary environments over millions of years.
Uses & applications
Used in electronics, glassware, precision instruments, countertops, and as a mineral specimen for collectors.
Geological facts
Quartz is one of the most abundant minerals in Earth's continental crust and exhibits piezoelectric properties, meaning it can generate an electrical charge when compressed.
Field identification & locations
Easily identified by its high hardness (scratches glass) and conchoidal fracture. Found worldwide in nearly every type of rock formation.
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