Camilla is wearing a badge and not a brooch. The badge is the one all dignitaries wear on Melbourne Cup day.
The badge is a mini cup !!
Actually, Camilla has not yet worn a brooch on this tour, as far as I can find.
--Previous Message-- : Is that a mini Melbourne cup brooch she is : wearing? Its not one I recall seeing : before. : : --Previous Message-- : : The badge is the Cup. : : MELBOURNE, AUSTRALIA - NOVEMBER 06: Camilla, : Duchess of Cornwall presents the Melbourne : Cup trophy to winning owner Nick Williams : after Green Moon won the Emirates Melbourne : Cup during 2012 Melbourne Cup Day at : Flemington Racecourse on November 6, 2012 in : Melbourne, Australia. (Photo by Vince : Caligiuri/Getty Images) : : : : http://cache1.asset-cache.net/gc/155611790-camilla-duchess-of-cornwall-presents-the-gettyimages.jpg?v=1&c=IWSAsset&k=2&d=GkZZ8bf5zL1ZiijUmxa7QULrxji5q%2b0TCebfiFIAoZt8Lxd%2fygGQw8u8TKtIgO8piA%2fFILocb4ddpGg3q8CKCw%3d%3d : : : --Previous Message-- : : I thought Camilla was wearing a brooch, but : no. : It is the badge all dignitaries wear on Cup : Day. : : MELBOURNE, AUSTRALIA - NOVEMBER 06: Camilla, : Duchess of Cornwall smiles on Melbourne Cup : Day at Flemington Racecourse on November 6, : 2012 in Melbourne, Australia. (Photo by : Brendon Thorne/Getty Images for the VRC)