
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, yellowish-brown to clear coloration, vitreous luster, and hexagonal crystal structure.
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Physical properties
Hardness of 7 on Mohs scale, yellowish-brown to clear coloration, vitreous luster, and hexagonal crystal structure.
Formation & geological history
Formed through hydrothermal mineral precipitation within hollow cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Commonly used in decorative ornamental objects, crystal healing collections, and lapidary work.
Geological facts
Geodes form when mineral-rich groundwater slowly deposits silica crystals layer by layer along the inner walls of a hollow cavity.
Field identification & locations
Identify by its distinctive outer weathered rind and sparkling crystalline interior cavity; widely found in limestone formations and volcanic regions worldwide.