RAPAPORT... Alrosa has unearthed a rough stone weighing nearly 200carats from its Udachnaya pipe, its largest in more than two years, the companysaid Tuesday. The 191.46-carat stone, which is white with a slightyellowish tinge, was found earlier this month at the asset's N12 processing plant. The Russia-based miner last found a comparably sized diamond two and a half years ago, it said. "Such large, gem-quality discoveries, weighing more than 100carats, confirm that there are many unique precious minerals in the reserves ofthe Udachnaya kimberlite pipe," said Evgeny Agureev, director of Alrosa'sUnited Selling Organization. Image: The 191.46-carat diamond. (Alrosa)