Camilla, Duchess of Cornwall looks an opalised shell plate during a viewing of a selection of opals from...
Camilla, Duchess of Cornwall (L) looks an opalised shell plate with Director of the South Australian Museum Brian Oldman during a viewing of a selection of opals from the South Australian Museum Opal Exhibition at Government House in Adelaide, November 10, 2015. REUTERS/Tracey Nearmy/Pool