Challenges in the Detection of Ruby and Sapphire Treatment in the Thai Market
Supparat Promwongnan, Wilawan Atichat, Cheewaporn Suphan, Wassana Chongraktrakul, and Visut Pisutha-Arnond
Colored gemstones of metamorphic origin: Progress report in understanding how they crystallize at depth in East Africa, the Hindu Kush, Pamir Mountains, and the Middle-Urals Ring Structure
It is difficult to reconcile the existence of deposits of trans- parent gems of metamorphic origin w
