The effect of adding Nd2O3, MoO3, and RuO2 separately or simultaneously on the crystallization of a soda-lime aluminoborosilicate glass during cooling from the melt or glass heating was studied by DTA, XRD (at room and high temperature), SEM, Raman, and optical absorption. Nd2O3 addition strongly reduces liquid-liquid phase separation and crystallization of calcium and sodium molybdates (CaMoO4 (powellite) and Na2MoO4) in Morich compositions as long as Nd3+ ions remain solubilized in the glassy network. This suggests that (MoO4)(2-) entities and Nd3+ ions are close to each other in the glass structure Nd3+ ions would prevent the clustering of molybdate entities). The effect of MoO3 addition in Nd-rich compositions is more complex since an increase of the solubility of Nd2O3 is observed, whereas the nucleation rate of an Nd-rich silicate apatite (Ca2Nd8(SiO4)(6)O-2) in the bulk of the glass increases as soon as molybdates crystallized. The addition of RuO2 has a nucleating effect on apatite crystallization in the bulk but not on molybdates crystallization.