Classic Bisbee psuedomorph of Malachite after Azurite, and the Campbell Shaft produced the best from Bisbee. The crystal is exceptionally fine, double terminated, and on matrix - qualities that combine to make this a fantastic specimen. This was originally purchased from Al McGuinness in the 1970s and the old label has hand written on the back 'this is a good rock' indicating that this one stood out quality wise even back then.