Fah'lun·ite (fä'lŭn*īt) noun [ From Fahlun , a place in Sweden.] (Min.) A hydrated silica of alumina, resulting from the alteration of iolite. [ 1913 Webster] Found on http://www.encyclo.co.uk/webster/F/3
Fahlunite or Falunite, named after Fahlun (Falun) in Sweden, is a hydrated silica of alumina, resulting from the alteration of iolite. It is a mineral of a greenish colour, occurring in six-sided prisms. Found on http://www.probertencyclopaedia.com/browse/HF.HTM