“Reflected light digital image in air (between partially crossed polarizers) of clausthalite (bright), tiemannite (medium-grey) mineralization, cementing calcite crystals and quartz (with dispersed light internal reflectance) filled with fine-grained inclusions of hematite (red internal reflectance). Width of image 1 mm. Please compare the corresponding tiemannite specimen mindat.org Photo ID: 957081. The Charlotte shaft on the Burgstatt veins (= “Burgstätter Gangzug” in German) is the type locality of tiemannite and clausthalite. G. Grundmann collection and photo. ”