Gemmology Today Issue September 2021
This issue covers a wide range of topics from the inclusion and gem photography of Wilma van der Giessen, retracing the history of pearl cultivation, Leonardo da Vinci and his connection with gems and gemmology, the 'other gems' of Sri Lanka, the diamond grading systems used by HRD, IGI and EGL, how important the refractometer is, a new book on tortoiseshell and an unusual green garnet with equally unusual inclusions.
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