Synthesis and characterization of NaAlSi2O6 jadeite under high pressure from 4.0 GPa to 5.5 GPa

The method of high pressure and high temperature (HPHT) has been used for the synthesis of jadeite. Through this method, the NaAlSi2O6 jadeite can be obtained in the pressure range of 4.0–5.5 GPa. All the experimental results reveal that the microstructure and properties of synthetic jadeite resemble the natural jadeite very much. The research indicates that the crystallization temperature of the synthesized NaAlSi2O6 jadeite rises with the increase of the pressure, which will help in gaining a deep understanding on the origin of natural jadeite.