sedimentary
Chalcedony Geode
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, botryoidal texture, waxy to vitreous luster, and cryptocrystalline structure. Colors range from white and cream to pale brown.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, botryoidal texture, waxy to vitreous luster, and cryptocrystalline structure. Colors range from white and cream to pale brown.
Formation & geological history
Formed through the deposition of silica-rich groundwater within cavities of sedimentary or volcanic rock over millions of years.
Uses & applications
Used primarily in lapidary arts, specimen collecting, and ornamental carvings.
Geological facts
Botryoidal chalcedony formations often resemble bunches of grapes lining the interior cavity of a hollow rock.
Field identification & locations
Identify by its distinctive grape-like bubbly crystal habit inside broken hollow rocks; commonly found in limestone and volcanic deposits worldwide.
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