Compared with Kafubu emeralds from Zambia,emeralds from Musakashi possess unique gemmological characteristics.This study selects 14 emeralds from the Musakashi mine as subjects,examining their characteristics using conventional gemmological instru-ments,laser Raman spectrometer,infrared spectrometer,microscopic UV-Vis-NIR spec-trometer,and laser ablation inductively coupled plasma mass spectrometry.Results indicate that the average relative density of the emerald samples from Musakashi,Zambia is 2.65.They exhibit red fluorescence under long-wave ultraviolet light,but inert under short-wave ultraviolet.The samples are relatively clean inside,featuring elongated growth tubes ar-ranged in parallel,beryl and"lotus root"inclusions.The fluid inclusions are mainly multi-phase,presenting jagged,elongated,and rectangle shapes.The gas components include CO2 and N2,the liquid phase is consisted of H2O,and the daughter minerals including halite and a carbonate.Infrared spectra revealed that the water molecules within the emerald channels are primarily Type Ⅰ water,showing prominent absorption peaks at 7 144,6 819 cm-1and 5 105 cm-1 in the near-infrared spectrum.UV-Vis-NIR absorption spectra demonstrated that the colour of the emerald samples is predominantly influenced by Cr3+ions.LA-ICP-MS analysis indicated that the Musakashi emeralds are characterized by low concentration of Fe,Mg,and alkali element,coupled with high Cr and V content.Binary log-log plots of Li ver-sus K and Rb versus Cs content can distinguish the Musakashi mine from other significant emerald deposits worldwide.
维普
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