sedimentary
Quartz Geode Fragment
Silicon dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on Mohs scale, translucent to grayish-purple color, vitreous luster, hexagonal crystal system, and no cleavage.
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Physical properties
Hardness of 7 on Mohs scale, translucent to grayish-purple color, vitreous luster, hexagonal crystal system, and no cleavage.
Formation & geological history
Formed through the deposition of silica-rich groundwaters within cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Used in lapidary arts, mineral collecting, and as ornamental decorative pieces.
Geological facts
Geodes form when mineral-rich water seeps into a hollow cavity in rock and slowly crystallizes inward from the outer shell.
Field identification & locations
Identified by its distinctive sparkly quartz crystal lining and rounded exterior; commonly found in limestone deposits worldwide.
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