More than this, we believe, is not possible, at least on our part.

We therefore advise those who have even the slightest doubt to contact the Opificio delle Pietre Dure (offices in Florence and Rome) to have an appraisal carried out (obviously before the purchase, we are very willing, in fact, happy to do so...), an appraisal that we recognize as very valid since said structure (of the Ministry of Cultural Heritage) is a non-commercial and definitely serious structure. This is the contact address: www.opificiodellepietredure.cultura.gov.it.