Ferberite-Huebnerite Series (Fe,Mn)WO4 - Monclinic
Description: The ferberite- huebnerite series describes a series of tungstates with varyng proportions of iron to manganese. They are relatively high temperature minerals characteristically found in quartz veins associated with granite.
MARATHON COUNTY: Both ferberite and huebnerite have been reported associated with topaz, cassiterite and other rare minerals from the McGuire Pit , just west of the LaDick east "rotten granite" quarries, west of Wausau. The ferberite-hubnerite form "dark red-brown to black crystals to 1.5 mm on and in albite and quartz".(Buchholz et. al., 2004).
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