sedimentary
Agate Geode
Silicon Dioxide (Quartz), SiO2
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, vitreous to dull luster, cryptocrystalline structure, white to translucent color with banded patterns, specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, vitreous to dull luster, cryptocrystalline structure, white to translucent color with banded patterns, specific gravity of 2.65.
Formation & geological history
Formed through the deposition of silica-rich groundwater inside gas cavities within volcanic or sedimentary rocks over millions of years.
Uses & applications
Widely used in ornamental carvings, gemstone jewelry, decorative display pieces, and lapidary art.
Geological facts
Geodes form when mineral-rich water seeps into a hollow cavity in a rock and slowly crystallizes inward, often leaving a hollow center lined with microcrystalline quartz.
Field identification & locations
Identified by its outer nodular crust, banded internal layers, and hollow interior lined with tiny quartz crystals. Commonly found in regions with volcanic activity.
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