10 Dollars - Elizabeth II Koala

The Australian koala bullion series, originally launched by the Perth Mint in 1987, has spawned a sprawling secondary market of fractional gold pieces issued by smaller Pacific sovereignties using Australian wildlife imagery under licensing arrangements. Solomon Islands has been a frequent participant. At half a gram, this piece sits at the absolute lower boundary of practical gold coinage — a denomination driven entirely by accessibility marketing rather than any monetary function.