Blue-green diamond called the "world's rarest" sells for record $17.3 million at auction

A 5.5-carat triangular-cut diamond billed as the largest fancy vivid blue-green diamond known to exist sold for $17.3 million ...
Daily Mail on MSN

Earth's rarest blue-green diamond up for auction: 5.50 carat gem could fetch £9.4 million

Dubbed the 'Ocean Dream', the diamond was discovered in its rough form in Central Africa in 2002.
Forbes

A 5.72-Carat Fancy Intense Blue Diamond Could Fetch $8 Million

Christie’s Magnificent Jewels auction in New York on December 10 is led by a 5.72-carat fancy intense blue diamond with an estimate of $6 million to $8 million. Also among the top lots are several ...
Forbes

Largest Fancy Blue Diamond Offered At Auction Could Fetch $8.5 Million

A 31.62-carat fancy blue diamond known as the Azure Blue will headline Christie’s Magnificent Jewels auction on June 9 in New York City, where it is expected to draw significant attention from ...