A nice specimen of lustrous black ferberite with a coating of contrasting bright orange jeromite and orpiment on quartz.  The "jeromite" is not actually a mineral-- it is an arsenic, selenium, sulfur glass that lacks a definite crystal structure (hence the "glass" term) best known from this mine.  In the past, I saw small single quartz crystals coated with this orange-red material, but this discovery is the first time that I have seen such rich examples. Not perfect, but quite colorful.