Jadeite Necklace Set Jewellery Collection 2

Jadeite Necklace Jewellery.
By Aamir Mannan.
Fine green jadeite owes its colour almost entirely to chromium, and typical chromium lines are seen in the red. There might be confusion here with translucent emerald, but in jadeite the lines are noticeably more diffuse. The douplet (not properly resolved) is centered at 


69I5A,and two weaker lines at 6550 and 6300A.There is strong general absorption of the violet end of the spectrum,but if the slit of the spectroscope be opened to allow more light through,a powerful band at 4370A can be detected lurking in the gloom.this is an iron band,and is seen at its best in the paler varieties of 

jadeite(white,lavender,pale green).It is narrow and  well-defined,and can be seen in light reflected from the specimen:it thus form a useful test for jade beads and ornaments.A similar but far weaker band may be detected at 4320A.
             If the green colour is
due to staining, a absorption band in the red due to the dyestuff will reveal the fraud.