The jadeitic jewelry in the world market is divided into four grade: A

B

B+C

and C. For A and B grade jadeite

it is determined that their average infractive index is respectively 1 655

1 655 and that their average specific gravity 3 310

3 258 g/cm 3 X ray diffraction showed jadeitic material and ureyitic material can be the two kinds of jade material of B grade jadeite. The typical spectrum of jadeite appeared in the infrade spectra and Raman spectra of both A and B grade jadeite

while B grade jadeite displayed the spectrum of C H group in the two kinds of spectra. The results of electron probe test revealed much carbon in B grade jadeite and the scanning electron microscope gave significantly different graphs of A B and C grade jadeite. With information revealing the difference between A and B grade jadeite

non damaged identification of all kinds of jadeite can be conducted.