Identification of a Convincing Yellowish Green Jadeite Imitation with Strong Fluorescence Composed of Wollastonite and Soda–Lime–Alumina–Silica Glass

Jadeite is a sought-after jade mineral that is often imitated using natural and artificial materials. A jadeite imitation that is convincing to the naked eye is investigated. The imitation is yellowish green and white, subtranslucent, and exhibits a vitreous luster. Standard gemological testing and spectral characterization revealed the composition to be wollastonite and soda–lime–alumina–silica glass. The wollastonite was added during the sintering process, making it different to wollastonite glasses prepared by devitrification in earlier reports. The findings demonstrated that shifted excitation Raman difference spectroscopy is a cost-effective, efficient, and nondestructive technique for identifying gemstones and their imitations, particularly those showing strong fluorescence.