On the identification of amber and its imitations using Raman spectroscopy - preliminary results
A total of 173 specimens of amber and its imitations were examined using conventional gemmological methods, followed by Raman spectroscopy. While conventional gem testing methods determined the basic gemmological properties of these organic compounds, the results obtained by Raman spectroscopy seemed to complement these findings. Compared to conventional gemmological testing methods, Raman spectroscopy is fast, non-contact, and non-destructive. Use of a near-infrared laser effectively eliminated the strong fluorescence in the yellow and red that is generated when a laser operating in the visible range excites amber.