‘Perfect’ diamond on tour before auction

The largest “perfect” diamond to ever be auctioned has touched down in London ahead of its predicted $25m (€22m) sale in New York this spring.

Considered to be internally flawless in appearance, the 100-carat diamond was in London for a one-day viewing ahead of Valentine’s day.

According to Sotheby’s, it joins an exclusive club of only five diamonds of similar quality, which weigh more than 100 carats, ever to be sold worldwide.