Diamond Congress Debates Treatments

The issues of fracture filling and low industry profits dominated the World Federation of Diamond Bourses and International Diamond Manufacturers Association Congress, held in May in Tel Aviv, Israel. At the last Congress in 1993, WFDB and IDMA enacted tough sanctions on diamond traders who fail to disclose that their goods are treated to improve clarity (fracture filling) or color (irradiation). This time around, the concern was how to prevent a public relations nightmare from erupting over undisclosed treated diamonds sold outside of the diamond bourse networks. Delegates from both organizations called on gem laboratories to continue their policy of not issuing grading reports for treated or synthetic diamonds. They also asked De Beers to help the trade develop a simple device to detect fracture-filled diamonds. Martin Cooper, research director for De Beers, said the company has
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