Element identification of different gemstones by using LIBS-PCA method

Abstract

Laser-induced breakdown spectroscopy (LIBS) is a flexible non-destructive method for both qualitative and quantitative analysis. These days, people are obsessed with gemstones apart from gold caused by the attractive natural look and, therefore, the sort of colour that is limited availability for the gemstone. However, due to this demand, the price was not stable. The seller easily misled the consumer because it is harder to distinguish the quality of different original natural gemstones. This study aims to characterize and analyze the element that is present from each spectrum in the gemstone. After that, the main element of the gemstone was identified, and the gemstone was classified by using multivariate analysis, Principal Component Analysis (PCA). Four types of gemstones were employed in this study. The spectrum was produced, and each line of emission represented the elements contained in the gemstone. LIBS-PCA technique is a method that can be used for the classification and characterization of gemstones.