Originally described by Mariano Barcena in 1874. It is one of the finest specimens of livingstonite we've seen! Crystals on this specimen occur as aggregates of metallic, bright lead-gray, slender prismatic and columnar crystals, elongate  up to 2cm in length intergrown with stibnite. The back of the specimen is dark gray-black, and ocherous. Occurs in low temperature hydrothermal veins at this locality in Mexico. J. R. Jelks collection label.