Polished Dendritic Agate - Madagascar Irradiated almost blackish-green you sometimes see

almost blackish-green you sometimes see in lower-quality bulk material

Because this is an unaltered earth product

Size: 18cm x 9cm x 11cm

Many of these pieces are found in association with dogtooth calcite or mimetite

Polished Dendritic Agate - Madagascar Irradiated almost blackish-green you sometimes seeThis 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