ADELAIDE, AUSTRALIA - NOVEMBER 10: Camilla, Duchess of Cornwall looks at an opalised shell plate with Director of the South Australian Museum Brian Oldman (right) during a viewing of a selection of opals from the South Australian Museum Opal Exhibition at Government House on November 10, 2015 in Adelaide, Australia. The Royal couple are on a 12-day tour visiting seven regions in New Zealand and three states and one territory in Australia. (Photo by Tracey Nearmy - Pool/Getty Images)
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