Dual-modal identification of jadeite based on optical coherence tomography images and Raman spectral features.

Low-quality jadeite is often subjected to bleaching, filling, and dyeing to improve its texture and consequently increase its value. In this study, natural jadeite, bleached and filled jadeite, and dyed jadeite were investigated by combining Raman spectroscopy and optical coherence tomography (OCT). The results show that jadeite composition can be identified from Raman peaks around 205, 377, 700, and 1040 .