An approach to understanding the factors in the emerald enhancement clarity grading system used at CDTECGemlab
Javier Garcia-Toloza, Juan David Rincón, Cristian Ochoa, Julio Cedeño Carlos
Modern Cultivation of Freshwater Pearls in China: Advances in Materials, Technique
This presentation explores the modern advancements in freshwater pearl cultivation in China, focusin
History of Garnet Mining and Cutting in the Austro-Hungarian Monarchy
Bohemian garnets, i.e., chromium-bearing pyropes, are found in several jewellery pieces from the Mig