RISPOLI, Concetta, Department of Earth, Environmental and Resources Science, Federico II University (Naples), Italy, Via cintia 26, Napoli, 80126, Italy; Center for Research on Archaeometry and Conservation Science (CRACS), Naples, Italy, Via cintia 26, Napoli, 80126, Italy and CAPPELLETTI, Piergiulio, Museum Center of Natural and Physical Sciences, University of Naples Federico II, Via Mezzocannone 8, Napoli, 80134, Italy; Center for Research on Archaeometry and Conservation Science (CRACS), Naples, Italy, Via cintia 26, Napoli, 80126, Italy; Department of Earth, Environmental and Resources Science, Federico II University (Naples), Italy, Via cintia 26, Napoli, 80126, Italy