<p>The solid-state reaction technique was utilized to yield a series of Eu³⁺ and Tb³⁺ ions doped (separately) with the NaMg₃₀SiO₃₂ phosphors. Scanning electron microscopy (SEM) images and powder X-ray diffraction (PXRD) patterns were utilized to analyze the phosphor's shape and phase development. Photoluminescence (PL) analysis shows that NaMg₃₀SiO₃₂: Eu³⁺, Tb³⁺ show extremely intense peaks at 617 nm (⁵D₀ to ⁷F₂), and 545 nm (⁵D₄ to ⁷F₅) during the excitation of 393 nm and 367 nm, respectively. A critical distance R_c for Eu³⁺ (8 mol%), and Tb³⁺ (10 mol%) ions was obtained to be 24.614 Å and 22.85 Å, respectively, regarding the effect of quenching of concentration. Average time of decay is found to be 2.86 ms and 4.47 ms for NaMg₃₀SiO₃₂: Eu³⁺, Tb³⁺, respectively. These phosphors' color coordinates of CIE chromaticity and corresponding temperature of color were computed. Based on these results, the NaMg₃₀SiO₃₂: Eu³⁺, Tb³⁺ phosphor could be used as a suitable phosphor for applications in white light-emitting diodes (WLED) due to emission in the red, and green regions, respectively, with good optical qualities.</p>