Figure F12. Photomicrograph showing reddish black chromitite, but altered grains and altered parts of grains are completely opaque. There are, or were, many inclusions of various sizes in chromite grains (Sample 209-1271A-4R-2 [Piece 2, 38–48 cm]) (plane-polarized light: blue + light gray filters; field of view = 11 mm; image 1271A_011).