Hello PIGs: here is an update from TUR2025 with a list of invited speakers. "Dear mineralogists, geologists, tourmaline scientists and lovers, TUR2025, the 4th international conference on tourmaline, is pleased to announce that the conference programme is in its final stage of preparation. We are thrilled to announce our invited speakers: • Darrell Henry. Revisions and updates to the tourmaline nomenclature. •⁠ ⁠Jan Cempírek and Milan Novák. Petrology of tourmaline in granitic pegmatites: state of the art. •⁠ ⁠Vincent van Hinsberg. Tourmaline thermodynamics and excursions to other borosilicates. •⁠ ⁠Peter Bačík, Jana Fridrichová, Andreas Ertl. Theoretical mineralogy and tourmalines: possibilities of the Bond Valence Topological Modeling. •⁠ ⁠Riccardo Luppi. Heat treatment of paraiba tourmalines from Mozambique: a study of color changes. •⁠ ⁠Sarah Brooker. Cu isotopes in tur (temporary title). •⁠ ⁠University of Antananarivo. Geology of Madagascar (temporary title). •⁠ ⁠(Speaker to be confirmed). Stable Isotopes in Tourmaline. • Paul Rustemeyer. (title to be confirmed). Please, find out more on tur2025.com The organising team looks forward to welcoming you in Antsirabe. Warmly, Giorgio Tarditi Organising Co-ordinator WhatsApp +39 346 642 7186" David London Pegmatite Interest Group: https://msaweb.org/pegmatites/