Bornite

This specimen is entirely made up of very rare, sharp, prismatic, iridescent crystals of Bornite  The individual crystals grow to 7mm across and display parallel growth, or elongate stack like structures of many crystals. This is a very well crystallised example of Bornite and the crystals are incredibly well formed - usually they have more rounded edges between their prism faces. A colourful and classic locality example of this copper mineral which very rarely develops prismatic crystals.