Fig. 1

Images taken during the analysis campaign at the Historical Museum of Crete. a, b The LIBS and Raman optical probes mounted on a rail permitting parallel work over surface of the stone inscription. c The Raman microspectrometer with its probe head positioned directly in front of a decorative stone relief in the exhibit room. The probe is mounted on a platform, permitting lateral translation, which is supported by a pair of tripods while the rest of the spectrometer is placed on a wheel platform