Stolzite/Raspite

Pyramidal pale yellow stolzite crystal. From the Black Pine Mine in Philipsburg District, Granite County, Montana. Field of view is about 2 mm. *(Photo courtesy Brent Thorne; unauthorized reproduction is prohibited.)*

Formula: Pb(WO)₄ Tetragonal/ monoclinic

Description:

Stolzite and raspite are dimorphs are formed by the oxidation of other tungsten-bearing minerals.

MARATHON COUNTY: Stolzite/Raspite has been found as microscopic grains in ferberite/hubnerite in the McGuire Pit, part of the LaDick East quarry complex east of Wausau. Other associated rare minerals include cassiterite, topaz and monazite (Buchholz et al., 2004).