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Revista mexicana de física

Print version ISSN 0035-001X

Rev. mex. fis. vol.60 n.3 México May./Jun. 2014




Optical characterization of amber of Chiapas


G. López-Morales, R. Espinosa-Luna*, and C. Frausto-Reyes


Centro de Investigaciones en Óptica, A. C. Loma del Bosque 115, Col. Lomas del Campestre, 37150 Leon, Gto., México, * e-mail:


Received 8 January 2014
accepted 19 March 2014



We show the refractive index value is a vulnerable test to discriminate true amber from false amber. In this sense, the fluorescence spectral signal is also a vulnerable test if the illuminating source has a broad spectral emission. We present results that allow us to conclude the Raman spectroscopy is a reliable test to distinguish amber of Chiapas from amber of the Baltic regions, and from false amber. We suggest the inclusion of the Raman spectroscopy to the Official Mexican Norm, NOM-152-SCFI-2003, to authenticate the amber of Chiapas.

Keywords: Optical properties of amber; polarization; fluorescence; Raman spectroscopy.



Mostramos que el valor del índice de refracción es una prueba vulnerable para discriminar ámbar verdadero de ámbar falso. En este sentido, la señal espectral fluorescente es también una prueba vulnerable si la fuente de iluminación posee un amplio espectro de emisión. Presentamos resultados que permiten concluir que la espectroscopia Raman es una prueba confiable para distinguir ámbar de Chiapas de ámbar de las regiones del Báltico o de ámbar falso. Se sugiere la incorporación de la espectroscopia Raman a la Norma Oficial Mexicana, NOM-152-SCFI-2003, para autentificar el ámbar de Chiapas.

Descriptores: Propiedades (ópticas del ámbar; polarización; fluorescencia; espectroscopia Raman.


PACS: 78.20.-e; 42.25.Ja; 78.55.-m;





Authors acknowledge to Dr. Gabriel Ramos Ortiz for provide us with the experimental equipment to measure the fluorescence and to Dr. Sergio A. Calixto Carrera for the measurements of the refractive index with the Abbe refractometer. The research leading to these results has received funding from the CONACYT under grant agreement 100361.



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