Figure F81. Chalcopyrite (medium gray) in cavity within a quartz mass (dark gray) that fills an amygdule. White mineral is pyrite (see Fig. F77, ) (Sample 193-1189A-7R-1 [Piece 13, 83-86 cm]; in reflected light; width of view = 0.7 mm. Photomicrograph ID# 1189A

Figure F81. Chalcopyrite (medium gray) in cavity within a quartz mass (dark gray) that fills an amygdule. White mineral is pyrite (see Fig. F77) (Sample 193-1189A-7R-1 [Piece 13, 83-86 cm]; in reflected light; width of view = 0.7 mm. Photomicrograph ID# 1189A_44; thin section 36).