I can only find six public engagements – although there may have been private occasions.

The Queen Mother was the original owner of the necklace which Princess Margaret famously made into a tiara for her wedding day. Harry has done that so beautifully on a personal level by using his mother’s precious stones into his new wife’s ring. She showed characteristic insouciance by wearing a jewelled necklace around her forehead; and she wowed the world in a pearl necklace with a glittering centre when she danced with John Travolta at President Reagan’s White House gala in 1985.I have tried to count how many times the Duchess of Cambridge has been seen in a tiara. With its mixture of contributions from both professional chefs and hoi polloi of gastronomy, the Quarantine Cookbook is accessible to all

The Queen’s engagement ring An understated piece of personal jewellery, the Queen’s three-carat diamond solitaire engagement ring was made from diamonds taken from a tiara once owned by the Duke of Edinburgh’s late mother, Princess Alice.

Other countries with kingdoms seem less discreet in showing their royal treasures. The Queen Mother wore the tiara frequently over the years and when she died in 2002 the tiara was inherited by Queen Elizabeth II who also wears it often.

The Queen's striking amethyst set, which includes a diamond brooch, necklace and earrings, is known as the Crown Amethyst Suite of Jewels …

Yet what about all the royal treasures?

If Kate had just worn a bold brooch on her lapel at Meghan and Harry’s wedding, it might have perked up the fourth-time-around showing of her white McQueen coat.Perhaps the Duchess of Cambridge, raised in a hard-working middle class family, does not feel comfortable with bold jewels, although Oprah Winfrey showed how to glitter with glamorous diamond earrings.

Queen Elizabeth the Queen Mother, was an exquisite juwel collector. Welcome to Tatler.