Figure F31. Close-up photomicrograph in cross-polarized reflected light of jasperoidal quartz showing strong red internal reflections (Section 193-1189B-6R-1 [Piece 2, 13-15 cm]; width of view = 1.38 mm. Photomicrograph ID# 1189B

Figure F31. Close-up photomicrograph in cross-polarized reflected light of jasperoidal quartz showing strong red internal reflections (Section 193-1189B-6R-1 [Piece 2, 13-15 cm]; width of view = 1.38 mm. Photomicrograph ID# 1189B_13, thin section 116).