A Study of Andesine Matrix Specimens Purported to be from Tibet
Shane F McClure1, George R. Rossman2, Kenneth Scarrat3
1GIA Laboratory, Carlsbad, CA 2California Institute of Technoloty, Pasadena, CA 3GIA Research, Bangkok, Thailand
During the investigation of red andesine from Tibet, several samples of
what appeared to be andesine in matrix were provided. This article
documents the examination of these specimens with the goal of proving
of disproving their authenticity. Microscopic examination, Raman ,
LA-ICP-MS and ATR were used and the results are presented. The
findiings strongly suggest these specimens are manufactured.
Infared ATR spectra of the matrix near andesine with organid components compared to the matrix away from the andesine.