Click on thumbnails for a larger image. Please be patient since some of these pages of thumbnail images take some time to load. These mineral photos are copyrighted by their owners and may not be used without permission.
Tyrrellite: (Cu,Co,Ni)3Se4 Umangite: Cu3Se2
Comments: Bright metallic partial cubic tyrrellite crystal in altering umangite. Location: Eagle Claims, near Hal Lake, Beaverlodge, Saskatchewan, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species