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Cerchiaraite: Ba4(Mn,Fe,Al)4Si6(O,OH,Cl)26
Comments: Green aggregates of cerchiaraite on matrix. Location: Cerchiara Mine, Near Faggiona, Val di Vara, Eastern Liguria, Italy. Scale: Specimen Size 13x7x6 mm. © Sergey Vasiliev / Systematic Mineralogy