Sphalerite, chalcopyrite, galena and pyrite. Parys Mountain, Britain




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250µm


Fine-grained and complex intergrowths occur between sphalerite, the main sulphide (light grey), chalcopyrite (yellow, top centre), galena (blue-white, centre bottom) and subhedral pyrite (light yellow-white, bottom centre). Dark grey areas are quartz.


Polished block, plane polarized light, x 80, air



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