Azurite contrasted against this rare green mineral species, arsentsumebite, not only is uniquely beautiful but also only came from one place (and time) on Earth. This is an old specimen from the 1st oxidation level of Tsumeb, known to have come out prior to the 1920s and likely much older. Few turn up for sale, anymore. This is an old specimen, formerly in the collection of Chris Amo of New York. It is a complete and beautiful, 3-dimensional piece, that looks good from all sides. Largest crystal is 1.6 cm.