gemstone
Dendritic Agate
Silicon Dioxide with manganese or iron oxides (SiO2)
AI-generated identification · may be incorrectHardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, translucent to opaque white with dark fern-like inclusions, cryptocrystalline crystal structure.
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Physical properties
Hardness of 6.5-7 on the Mohs scale, waxy to vitreous luster, translucent to opaque white with dark fern-like inclusions, cryptocrystalline crystal structure.
Formation & geological history
Forms in cavities of volcanic and metamorphic rocks via silica-rich groundwater precipitation over millions of years.
Uses & applications
Widely used in jewelry making, wire-wrapping, cabochons, and as a collector specimen.
Geological facts
The fern-like inclusions are not actual fossils, but rather crystallized mineral dendrites of manganese or iron.
Field identification & locations
Identified by its distinctive tree-like or fern-like branching patterns embedded within translucent chalcedony. Commonly sourced from India, Brazil, and the USA.
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