Diamond Spray Brooch from the Royal staffs in England | Princess 21st Birthday Gift
One of the first presents Princess Elizabeth received was a diamond spray brooch from all the members of the Royal Household. The then Princess Elizabeth was on a royal tour with her parents of South Africa on her 21st birthday, April 21, 1947.
Source: The Courier-Mail Brisbane; Western Daily News;
Above on the left the Queen is wearing the diamond spray brooch - her birthday gift. While in the picture on the right, Princess Elizabeth in 1947.
Thank you to Laura for that information!