The rain reveals new specimens. Posted on February 2, 2016 by Richard 1. Large crystalline quartz with a scattering of chalcopyrite. 2 and 3. Well formed siderite crystals on quartz. 4,5 and 6 Vuggy quartz with malachite and tiny sprays of linarite crystals best viewed with a loupe. A rare occurrence at Herodsfoot