Raman Microscopy of Diverse Samples of Lapis Lazuli at Multiple Excitation Wavelengths.

The article presents a research conducted on Lazurite, a part of the semi-precious stone Lapis Lazuli containing sodalite mineral. It was conducted on about thirty samples of the rock from various countries including Russia, China and Afghanistan. Raman Spectroscopy done on Lazurite can tell about its geographical source. The Lazurite's radical anion s₃^-, produces three spectras.