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.
Ankerite: Ca(Fe++,Mg,Mn)(CO3)2 Sphalerite: (Zn,Fe)S Dickite: Al2Si2O5(OH)4
Comments: White, rhombohedral crystals of ankerite and dark gray, metallic sphalerite on beige dickite. Location: Prego mine, Kladno, Czech Rebublic. Scale: Picture size 2 cm. © Dave Barthelmy