sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, transparent to white color, vitreous luster, and trigonal crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, transparent to white color, vitreous luster, and trigonal crystal structure.
Formation & geological history
Formed when mineral-rich groundwater deposits silica inside hollow cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Widely used as decorative items, in crystal healing, and as collector specimens.
Geological facts
Geodes start as bubbles in rock or animal burrows before mineral solutions slowly crystallize inward.
Field identification & locations
Identified by a rounded exterior shell with a sparkling crystal-lined interior cavity; commonly found in limestone formations.
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