Description

Black Agate is a variety of agate characterised by an intense black colour, which can vary from opaque to shiny black. It is composed mainly of microcrystalline quartz, but may also contain traces of other minerals such as iron and manganese. Black agate is often interspersed with white, grey or brown bands or streaks that contrast nicely with the black colour. These bands are the result of variations in the mineral composition during the formation of the stone.

The clast of wild black agate has a more elongated shape than that of classic black agate, which has a round shape. This stone is highly valued by designers and architects thanks to its beauty and durability.