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n.1.(Min.) A dark brown or black mineral, occurring in prismatic crystals imbedded in limestone near Warwick, New York. It consists of the borate and titanate of magnesia and iron.
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This year his stock included remarkable acicular warwickite microcrystals from the La Cella mine near Jumilla, Murcia Province; microcrystals of montgomeryite and alumohydrocalcite from Montcada in Barcelona Province, melilite and nepheline from a basalt quarry near Ciudad Real, and microcrystals of synchysite-(Ce) from the Valle de Aran in Lerida Province.
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