Rare ‘Mellon Blue’ Diamond Fetches $25.5 Million at Christie’s Geneva Market Reflects Shifting Demand for Coloured Diamonds
The legendary Mellon Blue Diamond a 9.51-carat fancy vivid blue, internally flawless gem sold for $25.5 million[…]
‘Mellon Blue’ Diamond Expected to Fetch Up to $30 Million at Geneva Auction
Geneva’s prestigious November auction season is set to dazzle the world once again, with the spotlight firmly[…]