Elpasolite, Gypsum
Le Cetine di Cotorniano Mine, Chiusdino, Siena Province, Tuscany, Italy
An octahedral crystal of elpasolite, pale yellow, in a vug, covered with colorless crystals of gypsum. Fluorite, which can be confusing, assume, in this locality, the cubic form with faces modified by dodecahedron and not with the faces of the octahedron. Collection and photo of Gianfranco Ciccolini. Nikon D610, bellows, APO Rodagon 50 mm; f: 2.8. ...