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Matildite on Chalcopyrite in matrix
Locality: Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Tiny, octahedral crystal of silver-coloured, metallic Matildite mounted on a larger crystal of brassy Chalcopyrite in a milky white Calcite matrix.
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Nickeline (pink/peach) and Maucherite (pinkish grey) with a rim of Gersdorffite (bluish grey) overgrown by intergrown Parkerite (light grey, twinning) and Hauchecornite (dull pink), then overgrown by Matildite (darker grey, rough texture).
Locality: Easter-Duffy Deposit, East Arm Region, Greater Slave Lake, NWT, Canada
Reflected Plane Polarized Light, 200X Magnification
Quick laundry list of minerals most people will have never heard of!
Matildite
AgBiS2
Locality:
Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
Field of View: 2.08 mm
Photo: Michael Förch
Matildite is a trigonal sulfide of silver and bismuth, usually occurring as grey to black granular masses that are opaque with a metallic luster. Formed in hydrothermal deposits at medium to high temperatures and in pegmatites.
From Mindat.Org Photo Of The Day; January 31, 2017:
Matildite: AgBiS2; Rhabdophane-(Ce): CePO4·H2O; Chalcopyrite: Cu1+Fe3+S2
Locality: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
“A wonderful composition between a dark grey metallic matildite crystal, yellow twinned metallic chalcopyrite crystals and a white globular rhabdophane-(Ce).” Collection: Heinz Förch; Photo: Michael Förch; Analyzed by Dr. Gröbner, Clausthal-Zellerfeld
Matildite
Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
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