mineral
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or clear with a vitreous luster, forming hexagonal crystal structures inside a hollow cavity.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or clear with a vitreous luster, forming hexagonal crystal structures inside a hollow cavity.
Formation & geological history
Formed when mineral-rich groundwater deposits silica inside hollow spaces within sedimentary or volcanic rocks over millions of years.
Uses & applications
Widely used in decorative displays, crystal healing, lapidary arts, and as mineral specimens for collectors.
Geological facts
Geodes start as hollow nodules in rock, often formed from gas bubbles in lava or animal burrows, and slowly grow internal crystal linings.
Field identification & locations
Easily identified by its rough outer shell paired with a sparkling interior crystal cavity; found worldwide, notably in Brazil and the USA.
