Pyrrhotite and pentlandite. Kambalda, Western Australia
Pyrrhotite (brown, centre) carries flame-like exsolution bodies of pentlandite (light brown, higher reflectance, centre right). Many of these exsolution bodies are associated with fractures in the pyrrhotite and are oriented along its (0001) plane. Black areas are silicates and polishing pits.
Polished block, plane polarized light, x 80, air