“Reflected light digital image in plane polarized light of klockmannite (kl), chalcopyrite (ch), goethite (g) and lepidocrocite (lep) symmetrically grown from the vein wall inwards forming a fracture-filling cementing krut’aite-penroseite (k-p) and clausthalite fragments (cl). Width of image 1 mm.”
Dr. Günter Grundmann - 29th January 2017