cross-posted from: https://lemmit.online/post/6076221

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The original was posted on /r/todayilearned by /u/tyrion2024 on 2025-06-14 17:26:48+00:00.

Original Title: TIL in the 1980s, a woman bought a ring at a car boot sale for £10 & proceeded to wear it regularly under the assumption it was a piece of costume jewelry. However when she had it appraised decades later, it was identified as a real 26-carat diamond ring from the 1800s, which she then sold for £656K