Sphalerite, pyrrhotite and galena. Unknown Provenance

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Pyrrhotite (brown, bottom) is intergrown with sphalerite (light grey, left) and galena (white, centre). A central silicate crystal has curved cleavage planes along which galena, pyrrhotite and sphalerite have penetrated. Dark grey areas are silicates.

Polished block, plane polarized light, x 80, air

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