gems, jade, pyroxene jade, jadeite, fei cui, synthetic jadeite, synthetic fei cui, simulants, HPHT

Using Al₂(SiO₃)₃ and Na₂SiO₃·9H₂O as raw materials, NaAlSi₂O₆ jadeite was synthesized through the high-pressure and high-temperature (HPHT) method. At 5.0 GPa and 1450 °C, the amorphous glass materials were fully transformed into crystalline NaAlSi₂O₆ jadeite. Experimental analyses using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) confirm that the synthetic jadeite closely resembles its natural counterpart in structure and properties. This research provides valuable insights into the formation and origin of natural jadeite.