TIP: Some jadeites may exhibit very strong fluorescence masking Raman features when initially exposed to green laser. This fluorescence may be reduced by using the built-in Photo-Bleaching feature of GemmoRaman software. Usually a less than one minute photo-bleaching procedure reduces general fluorescence enough for allowing better resolution of Raman peaks. Unfortunately, some jadeite samples does not react to Photo-Bleaching. In this case it is suggested to try other spots on the sample.