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Warwickite: Mg(Ti,Fe+++,Al)(BO3)O Chondrodite: (Mg,Fe++)5(SiO4)2(F,OH)2
Comments: Black crystalline warwickite with tan chondrodite in white marble. Location: Amity, near Warwick, Orange County, New York, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species