2025 Cook Islands Morgan Gold Coin 1/10 oz – 24% Pure Gold – NOT 24k. The 2025 Cook Islands Morgan Dollar Gold Coin is a stunning piece of bullion featuring 1/10 oz of. 24 Gold with a fineness of 0.2400. Struck as a proof coin by the U. Mint, it contains a total precious metal content of. This beautiful coin from the Cook Islands is a valuable addition to any collection, showcasing the rich history and craftsmanship of gold coinage.