mineral
Quartz Geode or Vein Quartz
Silicon Dioxide (SiO2)
Hardness of 7 on the Mohs scale, transparent to translucent with 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, transparent to translucent with vitreous to greasy luster, trigonal crystal system, conchoidal fracture with no true cleavage, specific gravity of 2.65.
Formation & geological history
Formed through the precipitation of silica-rich hydrothermal fluids or groundwater filling cavities in host rock over extended geological timeframes.
Uses & applications
Used in electronics, manufacturing of glass and ceramics, gemstone carvings, and as a popular specimen for mineral 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 electric charge in response to mechanical stress.
Field identification & locations
Can be identified in the field by its high hardness (scratches glass), lack of cleavage, and common presence within rock cavities or quartz veins. Found globally.
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