A 9.51-carat blue stone that once belonged to the heiress Bunny Mellon sold for $7 million less than at its last auction, a ...
A blue diamond weighing nearly 10 carats has sold at auction in Switzerland for 20.5 million Swiss francs ($26.6 million) ...
The Mellon Blue, a 9.51-carat fancy vivid blue diamond formerly owned by the US art collector Bunny Mellon, sold for $25.6 ...
Miners in Botswana have uncovered an extraordinary gemstone that has captured the attention of gemologists worldwide. The ...
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