Fig. 3

Raman spectra from green layer of CS5: a–d show characteristic peaks for emerald green, lavendulan, mimetite, baryte, cerussite; whewellite and gypsum. Black reference spectrums from RRUFF open database

Raman spectra from green layer of CS5: a–d show characteristic peaks for emerald green, lavendulan, mimetite, baryte, cerussite; whewellite and gypsum. Black reference spectrums from RRUFF open database