4 Dollars - Elizabeth II Dolphins

Cook Islands has issued miniature gold pieces under various dollar denominations since the 1990s, largely targeting the collector and gift market rather than any genuine circulation intent. This particular issue is part of a broader run of fractional gold coins — each containing roughly 1/30 troy ounce — produced under licensing arrangements that allow Cook Islands to attach its authority to coins minted almost entirely for the international bullion-collector trade. The .9999 fineness places it above the traditional .9167 gold standard, a specification that became a marketing benchmark after the Royal Canadian Mint introduced it with the Maple Leaf in 1979.