Dims: 4.5 x 3.6 x 2.1" (11.5 x 9.1 x 5.3 cm)
Wt: 15.6 oz. (442 g)
Huaron Mine, Ancash Department, Peru
Several Sphalerite crystals and clusters rest on the quartz host rock of this specimen. The Sphalerites are in moderately good condition, as some are badly broken and mostly incomplete, but those that are intact are in excellent condition and have a highly disseminated but well-defined octahedral-based form- twinning appears to be extensive, some of it according to Spinel-Law. All have the standard black-brown coloration and bright, resinous luster, and are opaque. They are accompanied by many transparent quartz crystals and several chalcopyrites that are coated with a dark gray crust. One such chalcopyrite is surrounded by an association of Sphalerites that could almost be considered a single entity (see the second image).