Gem Knowledge

Glass Simulants of Gems and Enhancement of Natural Gem Materials in the 16th Century

Guy Lalous ACAM EG, summarises the state of making glass simulants of gems in the 16th Century, as well as…

Discover Two Bewitching Cameos at the Natural History Museum, London

First published in The Journal of Gemmology Vol.35/No.8, Robin Hansen FGA, gem curator at the Natural History Museum, London, takes us through…

Challenging Perceptions: Meet the Gem Cutters Thriving in Newcastle

Sarah Steele FGA DGA, visits a growing community of gem cutters in Newcastle who are quietly, but effectively, pushing boundaries.…

Discovering Agates on the Shores of Cornwall, England

Cally Oldershaw FGA DGA describes the thrill of finding agate on the shores of Cornwall and reveals how these subtly-toned…

Inclusions Acting as Geological Fingerprints in Yellow Danburite from Vietnam

Guy Lalous ACAM EG summarises an article on inclusions in yellow danburite from Luc Yen, Vietnam, by Le Thi-Thu Huong,…

The Role of Fingerprinting Technology in the Fight Against the Ivory Trade

At New Scientist Live, Barbara Kolator B.Sc. M.Sc. FGA DGA EG met with Dr. Leon Barron, senior lecturer in Forensic Science…

The Ethics of Coral Jewellery and Sourcing for Gemmologists

December 2017: An Update from the Author No matter how much any information has been checked prior to publication, it…

An Update on Identification Features of Treated Baltic Amber

Guy Lalous ACAM EG explores a detailed characterization of Baltic amber samples treated in experiments by Wang et al.(2014) in…

How to Separate Natural from Synthetic Ametrine using Conventional Equipment

Guy Lalous ACAM EG summarises the discovery of features that could be used to distinguish between natural and synthetic ametrine…

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