Pyrargyrite

Diaphorite, Pyargyrite, Arsenopyrite | Rockvale Arsenic Mine, Rockvale, NSW, Australia. Ex Proff. Laurie Lawrence (Aus) specimen. Dark grey areas amid pyargyrite and arsenopyrite. Determined by XRD. See: Lawrence, L.J.; Chand, F., (1962). Ore minerals of...