5 Dollars - Elizabeth II Princess Diana Flowers at Buckingham Palace

Issued as part of the wave of Diana memorial coinage that surged around the time of the 25th anniversary of her death, this Cook Islands piece belongs to a category that has become genuinely crowded — the Pacific island nation has issued dozens of Diana-themed collector coins across multiple decades. Cook Islands holds legal authority to issue currency but has no meaningful circulation economy for these pieces; they are produced entirely for the philatelic and numismatic collector market, with the nominal face value bearing no relationship to bullion content or retail price.