Rapid Analysis of Chemical Composition and Physical Properties of Gemstones Using LIBS and Chemometric Technique

Laser-induced breakdown spectroscopy (LIBS), accompanied by chemometric data analysis, is used to identify and classify gemstones of various hardness. The study involves several gemstones: amethyst, aquamarine beryl, bloodstone citrine, diopside, enstatite. Their hardness determined through a correlation utilizing the spectral intensity ratio ionic atomic lines an identified element in LIB spectrum. result relative obtained from LIBS analysis good agreement with measured Mohs’s scale hardness, popular qualitative method determine In this work, linear relationship has been established between plasma excitation temperature. Thus, can be help Moreover, trace elements reveals that particular responsible for colors gemstones. Therefore, concentration constituents calculated all compared. Principal component (PCA) successfully applied gemstone spectra rapid classification discrimination based on their variable elemental concentrations respective