Composition: Manganese iron tungstate
Nomenclature: Named after the German word wolfram which means "tungsten." Wolfram is derived from volf (wolf) and rahm (froth) which, in turn, was derived from an earlier name Lupi spuma.
Industrial Uses: Tungsten ore.
Additional Notes: .
China (PRC) : Scott 1802 : 20 fen : 25 Aug 1982
Portugal : Scott 1106 : 1 escudo : 24 Sep 1971