Bright specimen, comprised of matte black sphalerite crystal clusters up to 1.5 cm across, with included chalcopyrite and small pyrite crystals, all sitting atop larger pyritohedral pyrite crystals to over 1.0 cm across. Relatively damage free – specimen is much more lustrous than can be seen in the photos above. Specimen is crystallized on both front and back sides. Ex. Pate collection. See the excellent article on the Eagle Mine and minerals of the Gilman District in Rocks & Minerals, Volume 78, Number 5 (September/October, 2003), pages 298-323.