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.
Comments: Silvery metallic penroseite masses in matrix.
Location: Unnamed prospect in Pacajake Canyon, near Culquechaca, Potosi, Bolivia.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species
Penroseite: (Ni,Co,Cu)Se2 Kitkaite: NiTeSe Sederholmite: NiSe
Comments: B&W polished section image showing kitkaite replacing calcite in penroseite, clausthalite and sederholmite. Note the absence of the clausthalite envelope around kitkaite..
Location: Valley of the Kitka river in Kuusamo, northeast Finland. (AmMin, v50:581).
Scale: 100 X.
© American Mineralogist