A heart-shaped pink diamond from the Rio Tinto Group Argyle Pink Tender is displayed in Sydney. (Photographer: Ian Waldie/Bloomberg)

The World’s Biggest Diamond Mine Is Closing

(Bloomberg) -- The world’s biggest diamond mine⁠—famed more for the fistful of coveted pink and red gems it yields each year than being a major producer of lower-quality stones—is being shuttered b...

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