Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.Title5TH ITALIAN NATIONAL CONFERENCE OF GEMMOLOGY.AuthorsLaurs, Brendan M.SubjectsGEMOLOGY; SAPPHIRES; EARTH sciences; ARTIFICIAL diamonds; STONE; SCREW dislocationsPublicationJournal of Gemmology, 2023, Vol 38, Issue 7, p718ISSN1355-4565Publication typeArticle