| PHASE TRANSFORMATIONS AS IMPORTANT MARKERS FOR HEAT TREATMENT DETECTION OF CORUNDUM AND OTHER GEMSTONES Michael S. Krzemnicki1,2, Pierre Lefèvre1, Wei Zhou1 1 Swiss Gemmological Institute SSEF 2 Department of Environmental Sciences, University Basel
Photos and figures © M.S. Krzemnicki and SSEF, except where indicated otherwise | 37th IGC Conference, Tokyo | October 2023 | PAGE 1