Black Septarian Freeform Large 15.1cm

Black Septarian Freeform, crystal for sale from Madagascar. This wonderful 15.1cm 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.