The zinc bismuth barium boro-tellurite glasses system doped with Dy₂O₃. Which varies dysprosium oxide concentration are 0.00, 0.05, 0.10, 0.15, 0.20, and 0.25 mol% of the composition 30TeO₂ – (38-x) B₂O₃ - 10ZnO - 2Bi₂O₃ – 20BaO - xDy₂O₃ have been synthesized by conventional melt quenching technique. This research study on physical and optical properties of zinc bismuth barium boro-tellurite glasses system. The results shown that the density increased whereas the molar volume decreased with increasing of Dy₂O₃ concentrations and the optical absorption spectra of glasses were measured in the wavelength range of 200 – 2,500 nm. The intensity of all absorption bands increased with increasing dysprosium oxide concentration.