|Queen Victoria's Diamond Jubilee Brooch|
|Queen Elizabeth, the Queen Mother|
|Queen Elizabeth II|
As a side note, Queen Elizabeth has received at least two brooches so far this year to commemorate her own Diamond Jubilee.
|Left, the Canadian regimental tribute; right, the Chelsea Flower Show brooch|
Photos: The Royal Collection/Corbis/Daylife/Royal Regiment of Canadian Artillery/Kristjan Eyjolfsson