Manganbabingtonite was first discovered by Soviet geologists in 1966，and it was found for the first time in China by the authors in，983 during their investigation of the Baiyinnuo Pb-Zn deposit in Baliny"ouqi, Inner Mongolia. Manganbabingtonite is columnar or granular in form, with the size of grains being 0.05-0.1 mm. It is transparent-subtransparent and is brownish gre- en-blackish green in color, It五as glassy Luster and is crisp in nature with, Mohs hardness about 6 and specific gravity 3.35. Optical properties; high po- sitive relief ; distinct pleochroism, Np green, Nm brownish yellow and Ng yellowish. green;c∧Np“31-47º;negative elongation,(+)2V=68º;Ng=1.745,Nm =1.727, Np=1.715;triclinic system, with space group Pl,a0=7.482A，b0=11.591A，C0= 6.694A，a=91º73'，β== 93º58'，γ=104º55'。Manganbabingtonite in this deposit, which was formed probably at the hydrothermal stage, is distributed along the fissures of Mn- and F e-bearing salite skarn,