Lammerite is Cu3[(As,P)o4]2 . High grade specimen of Lammerite, color dark green with Lavendulan, color blue to lavender blue, Cu3(AsO4)(OH)3, a arsenate. both minerals as Spheroidal aggregates . From the Guanaco Mine, Taltal, Antofagasta, Chile. size is 2" wide x 1-1/2" deep x with max. thickness of 1". Getting harder to find. Great value, as this sell on some sites as high as $75.00!
