Pink Star diamond fetches record $83m at auction

A diamond known as the Pink Star has sold for $83m (£52m) at auction in Geneva - a record price for a gemstone.

The diamond measures 2.69cm by 2.06cm (1.06 inches by 0.81 inches) and is set on a ring.

The Pink Star was sold to Isaac Wolf, a well-known New York diamond cutter, who has renamed it the Pink Dream.

Imogen Foulkes reports from Geneva.