For her 98th birthday celebrations in August 1998, she wore the brooch with an elegant ivory coat, which made the details of the brooch show up vividly.
The most prominent appearance of this brooch came in the summer of 2000 when she wore the brooch for her 100th birthday.
She wore the brooch with a lightly-patterned pink ensemble at a birthday pageant held in her honour in Horse Guards Parade.
Press reports described her attire for the event as “a pink dress and matching floppy hat, a three-strand pearl necklace and a large emerald and diamond brooch.”
When the Queen Mother died in 2002, all of her jewellery, including this brooch, was inherited by her daughter, Queen Elizabeth II.