Norbergite is a nesosilicate mineral with formula Mg )2. It is a member of the humite group.
It was first described in 1926 for an occurrence in the Östanmoss iron mine in Norberg , for which it is named. It occurs in contact metamorphic zones in carbonate rocks rocks or pegmatites supplying the fluorine. Associated minerals include dolomite, grossular, monticellite , fluoborite and phlogopite