Description
I admit, this is not the most sexy piece of this current auction, but it is a classic, old-time ore specimen from old Zeche Caspari (Caspari Mine) near Arnsberg in Sauerland, Germany. The whole specimen is covered with thin, felty-fibrous layers of dark steel-gray Boulangerite. Due to closure of this mine in 1885, pieces from here are relatively rare and seldom seen for sale on the market.