The first Brazilian Symposium on the Treatment and Characterization of Gems was held at the School of Mines of the Federal University of Ouro Preto, in Minas Gerais, Nov. 5-8, 2000. Brazil's Minas Gerais state has produced some of the most significant gem finds in the world, including large quantities of gem materials that can be treated to make them more salable. Considering the enormous commercial potential of Brazilian gems, Brazil's recognition of the importance of disseminating enhancement information is a great relief to many in the jewelry industry.
Irradiation. Approximately 130 people attended the conference, including Alice Keller, editor of the Gemological Institute of America's Gems & Gemology. On the subject of irradiation enhancement, Keller writes: "One of the problems with commercial irradiation of gems, according to Paulo Rela of the Brazilian Sterilization Co., is
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