Pyrite, magnetite, chalcopyrite and pyrrhotite. Lasail, Oman
Coarse pyrite crystals (light yellow-white, right) enclose pyrrhotite (brown, centre right), chalcopyrite (yellow, centre top) and cubes of magnetite (grey, centre right). Euhedral to subhedral magnetite (grey-brown, centre) and chalcopyrite (centre left) are intergrown with pyrite. Black areas are quartz and polishing pits.
Polished thin section, plane polarized light, x 160, oil