“The microstructure of complex Ni-Co-As ore from Richelsdorf. Strongly fractured aggregate of nickeline (bright orange to pinkish) and early nickelskutterudite (light grey) are partially replaced and cemented by palisades of rammelsbergite (off white) and barite gangue (dark-grey to black). Vertically reflected, plane polarized light digital image in air. Ore microscopy illuminates the darkness of the grey ugly with true reflectance colors! G. Grundmann collection and photo. ”

“The microstructure of complex Ni-Co-As ore from Richelsdorf. Strongly fractured aggregate of nickeline (strong brown to blue to green anisotropy) and early nickelskutterudite (isotropic) are partially replaced and cemented by palisades of rammelsbergite (orange brown to blue anisotropy) and barite gangue (various dispersed light internal reflections). Vertically reflected, plane polarized light digital image in air. Ore microscopy illuminates the darkness of the grey ugly with true reflectance colors! G. Grundmann collection and photo. ”