Multiphase, dark grey, sulphidic vein quartz, with silicified tuff fragments and hematite-goethite fracture infill. Minor crustiform-banded chalcedonic quartz is present. The sample is approximately 8 cm wide. Sample ON2-083
Multiphase, dark grey, sulphidic vein quartz, with silicified tuff fragments and hematite-goethite fracture infill. Minor crustiform-banded chalcedonic quartz is present. The sample is approximately 8 cm wide. Sample ON2-083