Sharp, lustrous, royal-blue to midnight-blue azurite crystals with hints of gemmy, "electric-blue" are very aesthetically clustered on this old-time specimen from the Tsumeb Mine. The large crystal is 1.2 x 1.0 cm. Ex. John Ydren Collection and comes with an old H. Maucher label. Herbert Maucher was the son of Wilhelm Maucher. Wilhelm was in charge of the mineral repository at the Freiberg Mining Academy and published the first major investigation on Tsumeb minerals. He became a full-time mineral dealer in Munich in 1908, until his death in 1930. Herbert and his sister took over the business, with the label name change coming in 1936. This piece dates to before World War II.