Fourth crowned portrait of HM Queen Elizabeth II facing right, wearing the Girls of Great Britain and Ireland tiara.

The Girls of Great Britain and Ireland tiara was a wedding present in 1947 from her grandmother, Queen Mary, who received it as a gift from the Girls of Great Britain and Ireland in 1893 on the occasion of her marriage to the Duke of York, later George V. Made by E. Wolfe & Co., it was purchased from Garrard & Co. by a committee organised by Lady Eve Greville. In 1914, Mary adapted the tiara to take 13 diamonds in place of the large oriental pearls surmounting the tiara. At first, Elizabeth wore the tiara without its base and pearls but the base was reattached in 1969. The Girls of Great Britain and Ireland Tiara is one of Elizabeth's most recognisable pieces of jewellery due to its widespread use on British banknotes and coinage.

Engraver: Ian Rank-Broadley

The Coat of arms of South Australia is was granted by Queen Elizabeth II on 19 April 1984. The shield has the piping shrike within a golden disc (officially said to represent the rising sun) on a blue background. Because the name piping shrike is not used to identify any bird, there has been some confusion over what bird it represents. While some think it resembles the magpie-lark (Grallina cyanoleuca), the original reports specify that it is based on the Australian magpie. The crest is the Sturt's desert pea, the floral emblem of South Australia, on top of a wreath of the State colours. The coat of arms has no supporters. The compartment, or base, is a grassland with symbols of agriculture and industry, and a motto with the name "South Australia".

South Australia became an original state of the Commonwealth of Australia on 1 January 1901. It covers some of the most arid parts of the country. With a total land area of 983,482 square kilometres (379,725 sq mi), it is the fourth-largest of Australia's states and territories. It has a total of 1.7 million people, and its population is the most highly centralised of any state in Australia, with more than 75 percent of South Australians living in the capital, Adelaide, or its environs. The state is unique in that it is the only province of the federation that was not settled by convicts.