sedimentary
Quartz Geode Fragment
Silicon Dioxide (SiO2)
AI-generated identification · may be incorrectHardness of 7 on the Mohs scale, typically white or translucent color with vitreous to sub-vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
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Physical properties
Hardness of 7 on the Mohs scale, typically white or translucent color with vitreous to sub-vitreous luster, trigonal crystal system, conchoidal fracture with no true cleavage, and a specific gravity of 2.65.
Formation & geological history
Formed through the deposition of silica-rich groundwater solutions inside hollow cavities (such as gas bubbles in volcanic rocks or animal fossils) within sedimentary or volcanic environments over millions of years.
Uses & applications
Used in crystal healing, mineral collecting, lapidary arts, and decorative display pieces.
Geological facts
Geodes start as hollow nodules of rock where mineral-rich water slowly deposits crystals on the interior walls over immense periods.
Field identification & locations
Easily identified by its outer weathered limestone or basalt crust combined with an inner lining of sparkling crystalline quartz points. Found worldwide in locations like Brazil, Mexico, and the United States.
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