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Franklinphilite: (K,Na)4(Mn++,Mg,Zn)48(Si,Al)72(O,OH)216·6(H2O)
Comments: A cleavage fragment of nearly pure franklinphilite. Location: Franklin mine, Sussex County, New Jersey.. Scale: Fragment Size 2.5 mm. © Jeff Weissman / Photographic Guide to Mineral Species