David Allen, creative director of 77 diamonds, said: 'If you were going to buy a ring tomorrow and wanted a ring like Kate's or Pippa's, Pippa's would be pricier. Kate's ring was inherited by William following the death of his mother in 1997. "It's only the history and story behind Kate's ring that makes it more valuable." Video will play in Play now Don't auto playNever auto playWhile Pippa's engagement ring is slightly smaller than her sister Kate's - and carries a lot less history - it cost much more. Believed to be made to order, it is very much in the Art Deco style of the 1920s and 1930s.

Source: New Zealand Herald July 20, 2016 00:11 UTC