Most expensive diamond sold at auction
Blue Moon of Josephine
48468158 US dollar(s)
Switzerland Geneva

Blue Moon of Josephine, a 12.03-carat cushion-shaped fancy vivid blue diamond, sold for US$48,468,158 (CHF 48,634,000; £31,939,478; €45,238,998), including commission, at Sotheby's auction, in Geneva, Switzerland, on 11 November 2015.

Previously called Blue Moon, the internally flawless diamond was renamed Blue Moon of Josephine by Hong Kong tycoon Joseph Lau, who bought the gem for his daughter Josephine.

The diamond was found in the Cullinan mine in 2014.