A beautiful consummate lustrous classic specimen of Metatorbernite from the Old Gunnislake Mine, Gunnislake (Metatorbernite was first discovered at this mine in 1798, although we can not say with certainty the specimen came from this find). The specimen displays a fine inter grown cluster of characteristic platy electric emerald green crystals. Faces of the Metatorbernite crystals have parallel development of thin square edges stepped crystals