Figure F43. Oil-immersion photomicrograph in reflected light of framboids of pyrite (or possible greigite, Fe3S4) in a vein dominated by marcasite (Section 193-1191A-2R-2 [Piece 16, 103-106 cm]; width of view = 0.14 mm. Photomicrograph ID# 1191A

Figure F43. Oil-immersion photomicrograph in reflected light of framboids of pyrite (or possible greigite, Fe₃S₄) in a vein dominated by marcasite (Section 193-1191A-2R-2 [Piece 16, 103-106 cm]; width of view = 0.14 mm. Photomicrograph ID# 1191A_04, thin section 49).