μ-SRXRF characterization of Brazilian emeralds

摘要

The aim of the present study is to characterize emeralds from different mines of Brazil by using Synchrotron Radiation X-ray Fluorescence Microanalysis (μ-SRXRF).The advantage of this technique is that we can analyze a homogeneous,inclusion free area of the stone with the microbeam to distinguish the elemental fingerprint according to the provenance of the emerald.A total of 47 samples belonging to 5 different Brazilian mines were studied in this work and 28 elements were identified.By means of Principal Component Analysis (PCA) it is possible to build different groups according to the provenance of the stones, which allows to assign samples of unknown origin to the according mine.