Gems in Greece: Geology, mineralogy and crystallizing environment
Panagiotis Voudouris, Stefanos Karampelas, Vasilios Melfos
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
