100 Dollars - Charles III Turquoise Coral Reefs

Niue's legal tender gold issues are a licensing arrangement — the island territory delegates coin design and marketing entirely to overseas minting houses, with the Niuean government collecting a royalty fee. The coin exists because that commercial model is profitable, not because Niue has any particular relationship to coral reef conservation or to the British Crown beyond its constitutional status as a self-governing territory in free association with New Zealand.