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This paper presents the results of magnetic separation tests for the recovery of colemanite from the ore and the tailings produced in Kestelek (Turkey) Processing Plant. Crushed ore (30.76\% B2O3) and tailings (31.76\% B2O3) samples were wet screened and classified into different size fractions. Size fractions coarser than 75 $\mu$m were subjected to three-stage magnetic separation using a high intensity permanent magnetic separator. The mineralogical composition of the ore and the tailings appears to enable gangu...