Car Boot Sale Diamond Discovery

In the late 1980s, a British woman bought a ring for £10 at a car boot sale-believing it was costume jewelry-and wore it daily. Decades later, an appraisal at Sotheby's revealed it contained a 26.2 carat diamond from the 1800s, likely misplaced by its unknown owner before ending up at the sale. She then sold it for £656,000.

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