Here we have an old-time, dramatic and showy combination specimen from the famous and now-closed Tsumeb Mine. Lustrous and sharp, midnight-blue Azurite crystals to 6 mm richly perched on a slightly elongated specimen, which is beautifully lined with sparkly, drusy, apple-green Arsentsumebite microcrystals. Tsumeb is the TYPE LOCALITY for this ULTRA-RARE lead copper arsenate, which is RARE, even at Tsumeb. This is a rich specimen of Arsentsumebite. Definitely old, from the upper oxidized levels of this very historic mine.