Dims: 4.1 x 2.6 x 1.3" (10.4 x 6.6 x 3.3 cm)
Wt: 10.46 oz. (296.5 g)
Pachapaque Mine, Ancash Department, Peru
Among the other metallic sulfides on this hand specimen rest scores of intergrown Tetrahedrite crystals. These crystals reach 0.4" (1.0 cm) in diameter and are generally in very good condition due to the fact that they are partly covered and protected by clusters and druses of tiny quartz crystals. Though heavily intergrown, their tetragonal form is evident and very well-defined, with sharp edges and clean faces. They possess the standard moderately dark gray coloration and metallic luster and are, of course, opaque. The Tetrahedrons are accompanied by intergrown crystals of pyrite, chalcopyrite and galena, which make up most of the base.