2025 Cook Islands 1 oz Silver The Spectrum – Peacock Coloured Coin. Whether as a child or as an adult. Looking at a peacock is always a very special moment. Especially when it unfurls its colorful plumage. This is exactly what this coin captures in an artistic way. The central design element is the visually stunning pattern of eye-like spots staring back at you. A special effect is also created by combining ultra-high relief with a newly developed coating technique called Prisma Plating: a proof finish that has never been seen before in this form.