A very rich specimen of classic deep to light green Bayldonite from the Penberthy Croft Mine, St. Hilary, Cornwall. Inter grown crystals of Bayldonite give a botryoidal appearance to the surface. Bayldonite having formed on a white ferruginous Goethite-Quartz matrix, with micro-crystal areas of colourless-white Mimetite. A fine small cabinet specimen from the type locality.