Identification Characteristic of Green Feicui from Myanmar and Guatemala

To investigate the structural characteristics and mineral components of green Feicui from Myanmar and Guatemala, provide references for distinguishing green Feicui from the two origins, and improve our understanding of the formation process, metallogenic conditions, and mechanisms of Feicui from different origins, 17 green Feicui samples from Myanmar and 20 green Feicui samples from Guatemala were tested by various methods and techniques, including conventional gemmological tests, infrared spectrometer, UV-visible spectrometer, and micro-Raman spectrometer, aiming to analyze their spectral characteristics and mineral components. The experimental results show that the main mineral component of green Feicui from Myanmar is jadeite, containing secondary minerals omphacite and calcite, while the main mineral components of green jadeite from Guatemala are omphacite or omphacite - jadeite, containing secondary minerals jadeite and carbon. The results of 3D micro-Raman mapping show that there is obvious interweaving and symbiosis between omphacite and jadeite in Guatemalan jadeite, which proves that 3D micro-Raman mapping is an effective nondestructive testing method to study the mineral components of Feicui.