Australia, Elizabeth II, Silver 1 Dollar Proof Coin, 2011, Issued as legal tender under the Australian Currency Act 1965, The design incorporates a transparent half-circle locket containing a natural Australian keshi pearl framed in mother of pearl, Obv: the coin bears the ian rank-broadley effigy of her majesty queen elizabeth II, Rev: an abstract interpretation of australia’s marine environment, one of the world's richest sources of south sea pearls, 31.135g, 40.60mm, UNC.