gemstone
Plume Agate
Silicon Dioxide (Chalcedony), SiO2
AI-generated identification · may be incorrectHardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to opaque, with microcrystalline quartz structure and conchoidal fracture.
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Physical properties
Hardness of 6.5 to 7 on the Mohs scale, waxy luster, translucent to opaque, with microcrystalline quartz structure and conchoidal fracture.
Formation & geological history
Formed in cavities of volcanic and metamorphic rocks through the deposition of silica-rich groundwater over millions of years.
Uses & applications
Widely used in lapidary arts, jewelry, decorative carvings, and as a collectible specimen.
Geological facts
The distinctive plume-like inclusions are typically composed of minerals like manganese or iron oxides trapped during chalcedony growth.
Field identification & locations
Identify by its translucent chalcedony body containing delicate, feather-like mineral inclusions; commonly found in regions with historical volcanic activity.
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