Minerals of the Chickering Mine Walpole, NH        COLUMBITE-(Mn)     (Mn,Fe)(Nb,Ta)2O6           Back to Chickering front page.
Specimen owner ID's (capitals): TM = Tom Mortimer, BW = Bob Wilken, BJ = Bob Janules, PC = Peter Cristofono, AW = Anna Wilken
Photographer ID's (lower case).
Identification: COL_1, COL_3 => visual, COL_2 => EDS analysis. Somewhat more Mn than Fe, but both present.
Discussion: A future analysis might indicate a Columbite-(Fe).
Highslide JS
COLUMBITE-(Mn)      7 mm black columbite-(Mn) crystal      PC     Photo: COL_1   [pc]
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COLUMBITE      5 mm black columbite-(Mn) crystal on quartz     PC     Photo: COL_2   [pc]
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COLUMBITE      3.5 mm black columbite crystal on quartz     PC - 2004     Photo: COL_3   [pc]