Abstract:ABSTRACT BACKGROUND: Quantitative analysis of mineral components, especially in complex minerals like jadeite, has been a challenging task in geology and gemology research. Laser-Induced Breakdown Spectroscopy (LIBS) has emerged as a promising technique for elemental analysis due to its ability to analyze multiple elements simultaneously, its non-destructive nature, and low detection limits. However, applying LIBS to complex mineral samples like jadeite requires overcoming challenges such as spectral overlap and matrix effects. OBJECTIVES: The objective of this study was to investigate the feasibility and accuracy of using LIBS for quantitative analysis of magnesium (Mg) and calcium (Ca) in Myanmar jadeite samples. Specifically, the study aimed to establish calibration curves for MgO and CaO using both line intensity and line integral intensity methods, evaluate their accuracy, and compare the results with those obtained from LA-ICP-MS analysis. METHODS: Twenty-two Myanmar jadeite samples were prepared and analyzed using a LIBS system consisting of a Nd:YAG laser, an ICCD detector, a spectrometer, and a computer. Calibration curves for MgO and CaO were established based on line intensity and line integral intensity methods using Si as an internal standard. The accuracy of LIBS analysis was assessed by comparing the results with those obtained from LA-ICP-MS analysis. RESULTS: The study successfully established calibration curves for MgO and CaO in Myanmar jadeite samples using both line intensity and line integral intensity methods. The correlation coefficients (R2) for MgO and CaO curves based on line intensity were 0.904 and 0.949, respectively, while those based on line integral intensity were 0.947 and 0.973, respectively. The relative deviations of MgO and CaO LIBS measurements from LA-ICP-MS reference values ranged from 3.70% to 42.19% and from 4.067% to 55.21%, respectively. CONCLUSIONS: The results demonstrate that LIBS is a promising technique for quantitative analysis of MgO and CaO in Myanmar jadeite samples. The line integral intensity method showed superior accuracy compared to the line intensity method, reducing the influence of matrix effects and experimental parameter fluctuations. These findings highlight the potential and feasibility of using LIBS in gemological research for quantitative analysis of complex mineral samples like jadeite.