mineral
Rock Crystal
Quartz (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, colorless or transparent, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
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Physical properties
Hardness of 7 on the Mohs scale, colorless or transparent, vitreous luster, hexagonal crystal system, and conchoidal fracture with no true cleavage.
Formation & geological history
Forms in hydrothermal veins, pegmatites, and cavity linings in various rock types through the cooling and precipitation of silica-rich solutions.
Uses & applications
Used in electronics, optical lenses, decorative items, and lapidary art.
Geological facts
Ancient civilizations believed rock crystal was eternally frozen ice formed by the gods.
Field identification & locations
Identified by its high hardness, distinct hexagonal prism habit, and lack of cleavage; found globally in pegmatites and quartz veins.
