mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
Hardness: 7 (Mohs scale), Color: Colorless (clear), Luster: Vitreous (glassy), Crystal system: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
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Physical properties
Hardness: 7 (Mohs scale), Color: Colorless (clear), Luster: Vitreous (glassy), Crystal system: Trigonal/Hexagonal, Cleavage: None (conchoidal fracture), Specific gravity: 2.65
Formation & geological history
Formed through the cooling of silica-rich magma or from hydrothermal veins. It is found in a wide variety of igneous, metamorphic, and sedimentary environments across all geological ages.
Uses & applications
Used in electronics (oscillators), glassmaking, abrasives, jewelry (as 'Rock Crystal'), and widely collected by mineral enthusiasts for metaphysical or aesthetic value.
Geological facts
Quartz is the second most abundant mineral in Earth's continental crust. Pure clear quartz is often called 'Rock Crystal' and was believed by Ancient Greeks to be permanently frozen ice.
Field identification & locations
Identify by its ability to scratch glass (hardness 7), distinctive conchoidal (shell-like) fracture, and lack of cleavage. Often found in riverbeds, mountain veins, or as geodes.
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