Figure F90. Spinel (dark gray), magnetite (medium gray), ilmenite (light gray), and hematite (white). Spinel has a thin coating of magnetite. Magnetite contains inclusions of hematite. Magnetite-ilmenite intergrowth on the left side of the photomicrograph (Sample 193-1188F-37Z-2 [Piece 3, 31-33 cm] in reflected light; width of view = 0.14 mm. Photomicrograph ID# 1188F

Figure F90. Spinel (dark gray), magnetite (medium gray), ilmenite (light gray), and hematite (white). Spinel has a thin coating of magnetite. Magnetite contains inclusions of hematite. Magnetite-ilmenite intergrowth on the left side of the photomicrograph (Sample 193-1188F-37Z-2 [Piece 3, 31-33 cm] in reflected light; width of view = 0.14 mm. Photomicrograph ID# 1188F_101; thin section 101).