Duchess Kate wears Nizam of Hyderabad necklace borrowed from Queen Elizabeth II at fundraiser

British Royal Jewels: The Queen's Nizam of Hyderabad Parure

"On the occasion of her marriage in 1947, Princess Elizabeth was positively flooded with gifts. According to the official list of wedding gifts released by St James Palace, Princess Elisabeth and Prince Philip received exactly 2583 presents. Not all of them were jewellery, of course; in fact, the most common gifts were stockings and books. Nevertheless, there was no lack of sparkle either.

The current demi-parure parure - the necklace and the brooches

One of the most beautiful gifts came from the Nizam of Hyderabad. The Nizam was the owner of one of the most celebrated and largest private jewellery collections in the world, and his gift was suitably impressive – a demi-parure of a tiara and necklace." continue reading Artemisia's Royal Jewels

Prince William's wife Catherine (Kate Middleton) dazzled onlookers at a dinner for London's National Portrait Gallery with a diamond necklace borrowed from the queen.

The Duchess of Cambridge was wearing a dark Jenny Packham dress yesterday, but it was the Cartier diamond known as the Nizam of Hyderabad, given to Queen Elizabeth II in 1947 for her wedding to the Duke of Edinburgh, that had tongues wagging. 

Other guests at the gala dinner -- the duchess's first official engagement of the year -- included Elizabeth Hurley, rocker Bryan Adams and artist Grayson Perry.
The duchess said she was "delighted" to be able to support the gallery.
"The gallery's achievements are exceptional," she told guests.
"They hold the most extensive collection of portraits in the world, and their unique and brilliant exhibitions never fail to inspire us all. -- Source: Siasat.com