The Use of UV-Visible Diffuse Reflectance Spectrophotometry for a Fast, Preliminary Authentication of Gemstones

Maurizio Aceto, Elisa Calà, Federica Gulino, Francesca Gullo, Maria Labate, Angelo Agostino, Marcello Picollo

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

The identification of gemstones is an important topic in the field of cultural heritage, given their enormous value. Particularly, the most important precious stones, namely diamond, emerald, ruby and sapphire, are frequently subjected to counterfeit by substitution with objects of lesser value with similar appearance, colour or shape. While a gemmologist is able to recognise a counterfeit in most instances, more generally, it is not easy to do this without resorting to instrumental methods. In this work, the use of UV-visible diffuse reflectance spectrophotometry with optic fibres (FORS) is proposed as a fast and easy method for the preliminary identification of gemstones, alternative to the classical methods used by gemmologists or to Raman spectroscopy, which is by far the instrumental method with the best diagnostic potential, but it cannot be used in situations of problematic geometric hindrance. The possibilities and the limitations given by the FORS technique are critically discussed together with the spectral features of the most important gemstones. Finally, the application of chemometric pattern recognition methods is described for the treatment of large sets of spectral data deriving from gemstones identification.

Lingua originaleInglese
Numero di articolo4716
RivistaMolecules
Volume27
Numero di pubblicazione15
DOI
Stato di pubblicazionePubblicato - ago 2022

Fingerprint

Entra nei temi di ricerca di 'The Use of UV-Visible Diffuse Reflectance Spectrophotometry for a Fast, Preliminary Authentication of Gemstones'. Insieme formano una fingerprint unica.

Cita questo