Historic Emeralds and their Geographic Origin: A Retrospective Study
Marie-Laure Cassius-Duranton, Vincent Pardieu, Stefanos Karampelas
Modern Cultivation of Freshwater Pearls in China: Advances in Materials, Technique
This presentation explores the modern advancements in freshwater pearl cultivation in China, focusin
On the nature of blue rose quartz
Over the past several years, the market for pink-coloured rose quartz has been augmented by variants