Black Septarian Freeform 18.5cm

Black Septarian Freeform Large, crystal for sale from Madagascar. This fabulous 18.5cm tall Black Septarian Freeform has an open cavity crystal chamber displaying rich black calcite crystal. It dates from the Cretaceous period, it is a fossilised mud ball which over millions of years cracked and then dried out, Calcite then leaked into the cracks to form the distinctive patterns that are displayed in this Freeform. ideal for the collector or healer or as an unusual display piece.