Mirror finish, super sharp, midnight-blue azurite crystals are aesthetically set on matrix on this OLD-TIME, CLASSIC Tsumeb specimen from the John Ydren Collection. Comes with an old H. Maucher label: he was a well-known German dealer in the late 19th and early 20th centuries. Definitely from the upper levels of this most famous and now-closed mine. Around a 100 years old.