Gemological Characteristics of New Transparent Brown Sapphire
Sutas Singbamroong, Tasnara Sripoonjan, Montira Seneewong Na Ayutthaya, Pukkapon Piantumdee, Tanyawit Sutipanya, Khaled Hussein and Nazar Ahmed
Padparadscha Sapphire & heat treatment
In 2018 the Padparadscha engagement ring of Princess Eugenie (Figure 1), the niece of the king, gave
Study of “amethysts” from the French Crown Jewels
Stefanos Karampelas, Eloïse Gaillou, Annabelle Herreweghe, Ugo Hennebois, Farida Maouche, Romain Bo
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