Iron-nickel alloy, troilite and chromite. Alta'ameem Meteorite, Iraq
Rounded iron-nickel alloy (white, centre) contains silicate inclusions (grey) and shows incipient irregular alteration (lower reflectance patches, centre top). It is surrounded by troilite (brown, left) and minor chromite (light grey, centre bottom). A discrete fractured chromite (right) also contains silicate inclusions. The majority of the groundmass is pyroxene (dark grey).
Polished thin section, plane polarized light, x 80, air