38 / No. 7 / 2023 Volume 38 COLUMNS 641 What’s New DiaSynth Diamond-detection Device | CIBJO Congress...from Manjaka, Madagascar | Sphalerite from Balmat, New York, USA | Tourmaline from Calabar, Nigeria | Sapphire...Fereire Moldavite from Chlum, Czech Republic: Mining and Gem Properties 696 By Tom Stephan, Štěpán...Gem-A Notices 722 Learning Opportunities 724 New Media 726 Literature of Interest 733 The Journal...Alonso-Perez Harvard University, Cambridge, Massachusetts, USA Alan D. Hart Gem-A, London Karl Schmetzer Petershausen |