SPHALERITE, CALCITE PYRITE

Group of sphalerite crystals with a deep black color and exceptional brilliance. They show the tetrahedron forms with complex twinning, and on a matrix of calcite crystals peppered by shiny pyrite with reddish to brownish reflections. A very aesthetic specimen. THE MAIN CRYSTAL IS: 1,6 x 1,4 x 1,1 cm. Fluorescence UVC (calcite).