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Zincostaurolite: [ ]4Zn4Al16(Al,[ ])2Si8O40[O6,(OH)2]
Comments: BSE image of zincostaurolite (St) grain replaced by Na-Ca-Li mica (Mi), gahnite Gah), Fe-Mn hydroxide (small rounded bright grains) and diaspore (darkest grains in upper left corner). Matrix consists of calcite (Cal). Location: Diaspore-bearing metabauxite from East Samos, Agean Sea, Greece. (AmMin v88:789). Scale: See Image. © American Mineralogist