Study of “amethysts” from the French Crown Jewels
Stefanos Karampelas, Eloïse Gaillou, Annabelle Herreweghe, Ugo Hennebois, Farida Maouche, Romain Bolzoni, Steven Riou, Quentin Dartois, Bérengère Meslin Sainte Beuve, Christelle Gliksman, Thiala Magalhaes, Valentine Demetz, Aurélien Delaunay
Fe-Ti charge transfers: A comprehensive review and its applications to minerals and gems
The iron-titanium charge transfer (Fe-Ti CT) is mentioned in numerous articles as the source of the