Held 11-17 September, this enormous show organized by UBM Asia featured more than 3,600 exhibitors from 48 countries and regions. There were numerous educational opportunities, and those attended by this author are reported here. The Gemstone Industry and Laboratory Conference (GILC), organized by the International Colored Gemstone Association, took place on 12 September and featured four speakers. Chris Smith (American Gemological Laboratories Inc., New York) described the history, properties and nomenclature of cobalt-coloured lead-glass-filled blue sapphires. The treatment debuted in 2007, and in 2012 Mr Smith noted significant improvements in the appearance of this material due to more careful selection of rough by the treaters and refinements in the process.
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