mineral
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectMohs hardness of 7, white to clear color, vitreous luster, hexagonal crystal system, conchoidal fracture, and specific gravity of 2.65.
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Physical properties
Mohs hardness of 7, white to clear color, vitreous luster, hexagonal crystal system, conchoidal fracture, and specific gravity of 2.65.
Formation & geological history
Formed when silica-rich groundwater precipitates quartz crystals inside cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Used in decorative items, lapidary art, crystal collecting, and as a source of industrial silica.
Geological facts
Geodes start as hollow bubbles in rock, gradually filling inward as mineral-rich fluids coat the cavity walls with sparkling quartz crystals.
Field identification & locations
Easily identified by its rough outer nodule shell and sparkling interior crystal cavity; common in limestone formations worldwide.
