Black Agate Druzy Polished Stone

 Black Agate is a banded microcrystalline form of the mineral Quartz, and does not occurs in visible crystals. It is a translucent to opaque material, possessing a specific gravity of Its chemical formula is i.e. Silicon dioxide. Its hardness is and has a hexagonal crystal system. It is found in all mineral environments but it is most prevalent in igneous rocks such as basalt.