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Cianciulliite: Mn++++(Mg,Mn++)2Zn2(OH)10·2-4(H2O)
Comments: SEM image of a typical cianciulliite crystals. The abundant incipient cleavage is very obvious. (AmMin, v76:1708). Location: Franklin, New Jersey, USA. Scale: Field of view is 0.3 mm. © American Mineralogist