Queen jewellery: A look at ‘Granny’s Chips’ worth over £50million

“Ever the innovator when it came to jewellery, Queen Mary set Cullinans III and IV on to her 1911 coronation crown, later on to her Delhi Durbar Tiara, used them as pendants on her Coronation Necklaces and her Ladies of India emerald necklace and wore them as a brooch to numerous important family functions, including the wedding of the then Princess Elizabeth.

“Queen Elizabeth, who inherited this astounding brooch from Queen Mary, fondly nicknamed it ‘Granny’s Chips’.

The Cullinan Diamond is the largest gem-quality rough diamond ever found.

The huge stone took eight months to be cut, despite workers toiling for 14 hours a day.