The crystallization of a SiO2–Al2O3–CaO–MgO–(R2O) glass in the presence of Cr2O3, Fe2O3, and TiO2 nucleants was investigated utilizing differential thermal analyses, X‐ray diffraction, and scanning electron microscope. The optimum nucleation and growth rates of aluminian diopside crystals was determined for the most promising glass specimen containing all three nucleants as 1018 m3/s and 6.17 ± 0.55 × 10−9 m/s, respectively. A time–temperature transformation (TTT) diagram was also constructed for 82 wt% crystallization for the above glass sample and a nose time of ≈55 min was obtained. The bending strength of some heat‐treated specimens were also determined and were related to crystallization behavior and microstructures. The highest strength value obtained was 166 ± 6 MPa.