mineral
Quartz with Chalcedony
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to waxy luster, conchoidal fracture, and trigonal crystal system. Colors range from milky white to translucent grey.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to waxy luster, conchoidal fracture, and trigonal crystal system. Colors range from milky white to translucent grey.
Formation & geological history
Formed through the precipitation of silica-rich hydrothermal solutions or groundwater in rock cavities, spanning various geological eras.
Uses & applications
Used in electronics, decorative objects, lapidary arts, and gemstone collections.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust and exhibits piezoelectric properties. Chalcedony is a microcrystalline variety of silica.
Field identification & locations
Identified by its high hardness, scratch resistance on glass, and lack of cleavage. Commonly found globally in pegmatites, hydrothermal veins, and sedimentary rocks.
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