A superbly defined old-time Cassiterite crystal from the classic Czech locale of Krupka (Graupen in German) of Krušné Hory Mountains. The crystal here is excellent doubly terminated and features a fine and distinctive striation. It is sharp edged as well and the terminations are excellent. Also luster, condition and overall aesthetics are great. Such items became very rare over the years and they are hard to come by nowadays.