The major product of wolframite series in Korea are wolframite and ferberite. In Cheolam silver deposits, however, huebnerite is occurred. The formation conditions of huebnerite and ferberite are similar, but that of huebnerite is higher Mn/Fe ratio and neutral or alkaline than ferberite. Based on E.P.M.A. data, chemical composition of the huebnerite from Cheolam silver deposits is (Mn_(0.89) Fe_(0.11))WO₄. The measured cell dimensions of the huebnerite is a_o=4.825Å, b_o= 5.755Å, c)o=4.997Å, the angle β=91.03° To compared with huebnerite will be occurred in the other districts, reflectivity and absolute hardness(VHN) were measured and described.

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