A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
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Analyses the chemical composition and inclusion characteristics of this ancient artefact.
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A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
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Details the process used by Wiede’s Carbidwerk to produce star synthetic corundum from the mid-1950s until the 1970s.
Read MoreSummarises statistical data and distinctive features of several thousand gem-quality HPHT synthetic diamonds examined by GIA from 2007 through 2016.
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Examines the sources, colour, texture and chemical composition of jadeite from Japanese deposits.
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Hardstone figures of two Russian imperial bodyguards, commissioned in 1912 by Nicholas II, demonstrate the House of Fabergé’s meticulous detail and craftsmanship.
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Examines Jaipur’s role as a coloured stone cutting and jewellery manufacturing centre, with profiles of 17 companies and their factory, trading and retail operations.
Read MoreThe heat treatment of corundum involving lattice diffusion of beryllium (Be) at temperatures over 1800°C has become a major issue in the gem trade.
Read MoreG. Robert (Bob) Crowningshield has made many significant contributions to the study of gems and the science of gemmology.
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