Excellent super rich specimen of Pharmacosiderite from one of Cornwall's most celebrated copper mines, namely Wheal Gorland, St. Day. Beautiful sparkling inter grown cubic crystals of deep green Pharmacosiderite measuring to almost 2mm, abundantly covers the display face of the characteristic Quartz-vein Goethite Gossan. Many other areas on the specimen also have sparkling micro-crystals of Pharmacosiderite. A fine and rich specimen from Wheal Gorland.