What does hetian jade refractive index 154 mean?

The refractive index of Hetian jade is 154, indicating that the refractive index of this jade is lower than or equal to 1.54, and its quality is relatively low.

Refractive index is the speed of light in the air, and it is one of the important methods to detect the quality of Hetian jade. Generally speaking, the refractive index of Hetian jade is between 1.606- 1.632. If the refractive index reaches 154, then this jade may be crystal, glass or agate.

The above information is for reference only. For more accurate information, please consult professionals.