Blue sapphire from Malacacheta of Minas Gerais, Brazil
Masaki Furuya
On the nature of blue rose quartz
Over the past several years, the market for pink-coloured rose quartz has been augmented by variants
Modern Cultivation of Freshwater Pearls in China: Advances in Materials, Technique
This presentation explores the modern advancements in freshwater pearl cultivation in China, focusin