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Anandite: (Ba,K)(Fe++,Mg)3(Si,Al,Fe)4O10(S,OH)2 Gillespite: BaFe++Si4O10
Comments: Black micaceous anandite with dark red gillespite.
Location: Esquire No. 7 Claim, Big Creek, Fresno County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species