Fluororichterite Na(Ca,Na)Mg5Si8O22F2 is an inosilicate/amphibole.
The crystals form in a skarn formation and the alteration it undergoes produces many odd and rare minerals like fluororichterite.
The Essonville Fluororichterite occurrence (Essonville Roadcut) in Wilberforce in Ontario, Canada is the best known locality for fluororichterite. Wilberforce is a small settlement near Bancroft, Ontario, a town known as the Mineral Capital of Canada.