Flourecence in your diamond ? Be cautious.

 1.How flourescence influences the price of diamonds?

 Answer.The  influence of  flourescence on price is variable.Flourescent diamonds of slightly tinted colour fetch 5% to 10% more price than diamonds with none flourescence. As in the case of  slightly tinted yellow diamonds,the clear blue flourescence can offset the yellowish tint under daylight to such  an extent that it may give the impression of being colourless.But,in the upper colour grades(D,E,F) flourescence means a reduced price because flourescence can effect the transparency and clarity of the diamond.Before buying a diamond, check under Longwave ultra-violet light at 366nm.      

                                               
U.V. Fluorescence of various coloured diamonds

1. Colorless to yellow diamonds (cape series): Blue or yellow under ultra violet lamp. Natural colorless diamond exhibits blue under longwave while Synthetic colorless diamond generally exhibits blue under shortwave. Synthetic yellow diamond exhibits green in shortwave.
2. Brown: Green to greenish yellow under ultra violet lamp.
3. Pink: Variable; exhibits orange under ultra violet lamp.
4. Some diamonds exhibit phosphorescence.