Galena, chalcopyrite, argentian tetrahedrite, bournonite and native antimony. Le Pulec, Jersey, Channel Islands, Britain

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Galena (white, top) is intergrown with chalcopyrite (yellow, bottom) which carries bournonite inclusions (blue-grey, bottom centre). Argentian tetrahedrite (brown, centre) is rimmed by bournonite (blue-grey, centre right) and chalcopyrite. Small grains of native antimony (white, high reflectance, bottom right) are enclosed within bournonite. Black areas are polishing pits.

Polished block, plane polarized light, x 400, oil

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