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Dickite: Al2Si2O5(OH)4 Ankerite: Ca(Fe++,Mg,Mn)(CO3)2 Sphalerite: (Zn,Fe)S
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
Comments: Porcelaneous pure white massive dickite.
Location: Beaver County, Utah, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species