Figure F95. Euhedral quartz-1 overgrown by magnetite and quartz-2 overgrown by pyrite. The pyrite contains inclusions of magnetite from quartz-2 (Sample 193-1188F-26Z-1 [Piece 2, 20-23 cm] in reflected light; width of view = 0.275 mm. Photomicrograph ID# 1188F_36; thin section 90).