sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, trigonal crystal system, and colorless to white with iron-oxide staining.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, trigonal crystal system, and colorless to white with iron-oxide staining.
Formation & geological history
Formed through the precipitation of silica-rich groundwater inside cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Used in decorative displays, gemstone collections, and industrial abrasive manufacturing.
Geological facts
Geodes form when mineral-rich water seeps into a hollow cavity in host rock, slowly crystallizing inward from the outer walls.
Field identification & locations
Identify by its rounded exterior and sparkling crystal-lined interior cavity; commonly found in limestone formations.
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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