Russia's State Precious Metals and Gemstones Repository (Gokhran) has started to buy polished diamonds from Kristall of Smolensk, the country's biggest cut diamond producer, said Gokhran chief Andrei Yurin on the sidelines of the Third International Jewelry Economic Forum. "Cut diamonds [of a fairly high quality] are now being purchased from Kristall," he said. "Something like more than half has already been purchased." The Gokhran might buy 3 billion rubles ($45 mil) worth of cut diamonds from Kristall this year, reports have said. Uncut diamonds from Alrosa are not being purchased.