Alrosa has unearthed a rough stone weighing nearly 200 carats from its Udachnaya pipe, its largest in more than two years, the company said Tuesday.
The 191.46-carat stone, which is white with a slight yellowish 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.
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