Stillwater Mine, Stillwater County, Montana, USA

A 3.5 x 2 x 1 cm anhedral mass of pyrrhotite with 1 cm diameter augite crystal and a 1 cm silver colored, triangular shaped braggite crystal or mass. John Rakovan photo.

© John Rakovan

Pale brass-yellow metallic mooihoekite associated with some dark brass-yellow chalcopyrite. Field of view 5 mm.

© Leon Hupperichs

Telargpalite – 5 mm gray metallic exposed on an 8 x 8 mm sawn matrix. See additional photos and Excalibur Minerals label.

© Christopher O'Neill

Telargpalite – close-up of 5 mm metallic streak exposed on sawn matrix.

© Christopher O'Neill

Metallic silver colored keithconnite associated with chalcopyrite and chromite. Specimen has been microprobe analyzed. Brent Thorne specimen and photograph.

© Brent Thorne 2012

Mooihoekite showing orange-brown tarnish, intergrown with a light brassy mineral resembling pyrite, in quartz-rich matrix. Field of view 6.3 mm. Collection and photograph Norman King.

© Norman King

according to remark on the box 'microprobed by S(id)W(illiams)' photo and collection Joachim Esche modified Wild M420 photomacroscope with apozoom and Canon EOS 550D

© Joachim Esche 2015

Silver metallic grains of telargpalite with chalcopyrite. This specimen has been microprobe analyzed. Brent Thorne specimen and photograph.

© Brent Thorne 2012

Telargpalite – gray metallic

© Christopher O'Neill

Classic, representative, Platinum Group Metal (PGM) ore from the Stillwater Mine showing brassy-yellow chalcopyrite blebs in a mottled, dark gray & white pyroxene (augite) - rich matrix. Trace pentlandite, pyrrohite occur & are evident under magnification. This ore comes from the J-M Reef, a Pd-Pt rich mineralized zone in the Stillwater Complex. ...

© Bill Hamel

Photo taken ca. 2014 by Michael L. Zientek, U.S. Geological Survey. Public domain. Caption: "The east side of the Stillwater River canyon, near Nye, Montana. The prominent outcrops in the canyon wall are plagioclase-rich, layered igneous rocks of the Stillwater Complex. The tailing pond of the Stillwater Mine is in the foreground. The ...