The Koh-i-Noor diamond is back in the headlines. The 105.6-carat giant gem, which William Dalrymple describes as “the world's most infamous diamond” in his book on the history of the stone, will not be part of the next British Royal coronation ceremony.   The Queen Consort Camilla will not be donning the contentious diamond for her coronation at Westminster Abbey in May, Buckingham Palace has announced. The Koh-i-Noor, which is one of the world’s largest cut diamonds, is traditionally held in The Queen Mother's Crown, worn by Queen Elizabeth the Second during her coronation. Camilla will wear the Queen Mary crown, commissioned and worn by the consort of King George V for the 1911 coronation. The Queen Mary Crown has been taken out of the Tower of London's collection to be modified for the event on May 6 and decorated with the Cullinan III, IV and V diamonds.