- A black rock is expected to fetch over $6m at a Sotheby's auction. Send this to nocoiners who say bitcoin is worthless because it has no use. https://www.bbc.com/news/world-60242199 86 comments bitcoin
- Billion-year-old mysterious black diamond "The Enigma" goes up for auction https://www.bbc.com/news/world-60242199 2013 comments worldnews
- The Enigma: Mysterious diamond from space up for auction https://www.bbc.com/news/world-60242199 10 comments space
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