Polished Dendritic Agate - Madagascar Mangano Calcite this unique sodium calcium silicate

this unique sodium calcium silicate gets its iconic oceanic coloration from trace amounts of copper replacing calcium within its crystal structure

These hues are a result of varying concentrations of iron oxides and other trace minerals that became trapped within the silica-rich rhyolite during its volcanic formation

Size: 90mm x 43mm x 9mm

Their distinct banded and swirling patterns make them unique and aesthetically appealing

Polished Dendritic Agate - Madagascar Mangano Calcite this unique sodium calcium silicateThis Polished Dendritic Agate is a striking mineral specimen sourced from the rich, diverse geological deposits of Madagascar. As a semi translucent variety of chalcedony quartz, this material is defined by its complex, tree like or fern like inclusions trapped inside a clear to milky silica body. These delicate structures are formed by a process known as dendritic branching, which occurs when iron and manganese rich mineral fluids seep into micro