Red uvite from the Arnold talc mine contains up to 4.34 wt. % MnO as determined by microprobe analyses. The manganese content is unusually high for a lithium-poor tourmaline and is in great contrast with the abundant, manganese-poor dravite and uvite that occur elsewhere in the Gouverneur area. The red uvite occurs with manganese-bearing tremolite (hexagonite), braunite Mn 7 SiO 12 and quartz in a carbonate-rich sequence in the Balmat-Edwards Synform.--Modified journal abstract.

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