BBC2 年
The Enigma: Billion-year-old black diamond sold for £3.16m
The 555.55 carat black diamond has belonged to its current owner for two decades but little is known about its history before that. A billion-year-old black diamond, believed to be the world's ...
BBC2 年
The Enigma: Mysterious black diamond up for auction
The 555.55 carat black diamond has belonged to its current owner for two decades but little is known about its history before that. A billion-year-old black diamond, believed to be the largest cut ...