mineral
Quartz Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal system, and colorless or white with variable internal coloration.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous luster, hexagonal crystal system, and colorless or white with variable internal coloration.
Formation & geological history
Formed through the slow deposition of silica-rich groundwater inside hollow cavities of sedimentary or volcanic rocks over millions of years.
Uses & applications
Widely used for ornamental display, decorative items, lapidary arts, and mineral collecting.
Geological facts
Geodes start as gas bubbles in volcanic rock or nodules in limestone that gradually fill with mineral deposits from circulating fluids.
Field identification & locations
Easily identified in the field by their rounded, knobby exterior and hollow interior lined with sparkling crystal points.
