“Slightly fragmented breithauptite crystals (pink to pale violet pleochroism), partially replaced by ullmannite (light-grey), and cemented by galena (pale-blueish-grey), chalcopyrite (yellow), and very minor “fahlore” (dark-grey) and löllingite (bright) in calcite matrix (almost black). Vertically reflected plane polarized light digital image in air. Width of image 0.5 mm. Ore microscopy illuminates the darkness of the opaque “grey ugly” with true reflectance colours! G. Grundmann collection and photo. ”

“Slightly fragmented breithauptite crystals showing strong anisotropic, colourful rotation tints from pale olive green to brownght-grey), partially replaced by ullmannite, and cemented by galena, chalcopyrite (grey-green rotation tints), and very minor “fahlore” and löllingite in calcite matrix (dispersed light internal reflections). Vertically reflected light digital image in air with crossed polarizers. Width of image 0.5 mm. Ore microscopy illuminates the darkness of the opaque “grey ugly” with true reflectance colours! G. Grundmann collection and photo. ”