Silvery metallic aggregated micro-crystals of the uncommon mineral Gudmandite are clustered in each side of a vein mixture of massive Sphalerite and Quartz. Crystals of Gudmandite an Iron Antimony Sulphide are associated with well formed octahedral crystals of Galena, and brown-red Sphalerite crystals. Possibly from the Uranium Mine No19, Dubenec.