Pyrite, pyrrhotite, magnetite and chalcopyrite. Ducktown, Tennessee, USA




Click here



500µm


Pyrite (yellow-white, top) is surrounded by pyrrhotite (brown, top right), showing cleavage (black, top right), or forms small euhedral crystals within pyrrhotite (bottom left). Magnetite (light grey, top left) is euhedral and has pyrrhotite inclusions (bottom right). Amphibole (dark grey) has a partial rim of chalcopyrite (yellow, centre left) and inclusions of chalcopyrite, pyrrhotite and pyrite.


Polished block, plane polarized light, x 40, air



Click here for Associations Click here for Mineralogy Click here for high-res image (~300K)