I don't think those items should be described as Australian gifts because they are from "Marys of the Empire". Goodness knows who organised or masterminded the collection of the donations from around the Empire.
So it does look like two 10 stone bar brooches - or Queen Mary had her gift altered and enlarged to 14, which is my betting.
--Previous Message-- : Here is Nellie's article depicting the Garter : gifts which included the "10-spot" : brooch. : : The Gift was actually fom the "Mary's : of the Empire" : : : :