Africa-focused Petra Diamonds (LON: PDL) has unearthed an ultra-rare blue diamond weighing just under 42 carats at its Cullinan Mine in South Africa, a discovery that could sell for as much as $40 ...
“The Mediterranean Blue” is 10.3-carat fancy vivid blue diamond with a VS2 clarity grade. It's the highlight of Sotheby's High Jewelry sale in Geneva. Fancy vivid blue diamonds of more than 10 carats ...
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