We prepared Y2Mg2Al2Si2O12:xTb3+ (x = 0.02, 0.04, 0.06, 0.08, 0.10, 0.12, 0.14 and 0.16) luminescent materials using a nodulizing procedure. The phase and luminescence properties of these materials were investigated. X‐ray diffraction results demonstrated that Tb3+ ions doped into Y2Mg2Al2Si2O12 hosts successfully and the Y2Mg2Al2Si2O12:xTb3+ materials showed a pure cubic phase. Y2Mg2Al2Si2O12:xTb3+ materials had the characteristic Tb3+ emission bands derived from 5D4→7F6, 7F5, 7F4, and 7F3 transitions when excited at 365 nm. The green emission band that derived from the 5D4→7F5 transition was highest due to the high possibility of both electric‐dipole and magnetic‐dipole transitions. Emission spectra indicated that the critical concentration of Tb3+ in the Y2Mg2Al2Si2O12 host was 0.14. The concentration quenching of Y2Mg2Al2Si2O12:Tb3+ was derived from a dipole–dipole interaction.