Group of hübnerite crystals with striated prismatic faces, sharp edges and well defined terminal faces. They are idiomorphic, well dimensioned, and show an intense black color; very brilliant and well disposed in a matrix rich in hyaline quartz crystals. Some of the quartz crystals are interpenetrated with hübnerite ones. These exceptional specimens are from the pocket Labor Teo (Teo works) found at the end of 2009. THE MAIN CRYSTAL IS: 2,3 x 0,8 x 0,7 cm.