Comparative Study of CaF and CaO, and Elemental Analysis of Fluorite Gemstone by Calibration Free Laser Induced Breakdown Spectroscopy

Abstract

Laser-induced breakdown spectroscopy is the most intellectual and best technique that contributes well to mineralogy for qualitative and quantitative chemical analysis using the Origi Software 9.1 version. In this study, by using CL-LIBS, we calculated Ca 88%, iron 9%, Si, and Na 1 % respectively, in the Fluorite gemstone. Fluorite is used in decorative pieces and jewelry just because of the major concentration of Ca, and less detected molecules mentioned as CaO and CaF are secreted in Fluorite Gemstones. It was the first time anyone had worked on such minerals. The determination of elemental composition, major and trace elements, and the fingerprint of Greenish-Fluorite gemstone was carried out in this study. This Greenish-Fluorite gemstone was collected from Astak mine, Rondo Valley, Gilgit-Baltistan, Pakistan.  The highest peaks of Ca-I are observed at 585.74 nm, lithium at 760.77 nm, and sodium at 588.99nm. The observed spectra line shows CaF found at a range of 590 - 608 nm, and CaO at 616 - 625 nm.