Valuevite is a rare, aluminium-rich variety of clintonite, first and only described from Nikolaye-Maximilianovsk Mine, Nazyamskie Mts, Zlatoust, Chelyabinsk Oblast', Southern Urals, Russia.
The specimen consists of deep silvery-green, high lustrous "leafy" crystals of valuevite associated with minor matrix.

Comes with antique W. Maucher label dated 1909-1936.
Wilhelm Maucher was a prominent mineral dealer in Munich, Germany, born May 28, 1879. Wilhelm attended the Freiberg Mining Academy beginning in 1899 to study mineralogy and earned his Diplom-Ingenieur degree, remaining there after graduation in 1904 and joining the faculty as an instructor. He worked for the Academy's in-house mineral dealership, the Königlich-Sächsische Mineralien-Niederlage zu Freiberg, (q.v.) from 1904 to 1909 before leaving the Academy and establishing his own independent mineral specimen dealership in Munich at Schellingstrasse 73 in September 1909.
Wilhelm Maucher's sons inherited his love of geology and mineralogy, and each obtained professional degrees in the field. His daughter Elisabeth, however, was the one who eventually took over her father's mineral business following his death on May 4, 1930. When she married Hans Anneser in 1936, a change in company name was required, but she did not want to give up the association with the Maucher name, and so her brother Herbert Maucher (1906-1982) allowed his name to be used (thus the labels change from "W. Maucher" to "H. Maucher" in 1936).
In December 1944 the shop at Schellingstr. 73 was destroyed by Allied bombing. After the war Elisabeth reopened the shop at Gleichmannstr. 9 in the Pasing neighborhood of Munich, under the new name Kristallgarten Maucher. Labels thereafter read "Maucher, Pasing". Elisabeth Maucher-Anneser died March 28, 2007; the shop remains open under the management of her son, Johannes Anneser (now selling primarily jewelry).