Shades of Nature Coin Collection – Proof Silver Cook Islands. 25 g 92.5% Proof. Mintage of 2,000. This is second hand item and as such there may be minor wear to the packaging and capsule. Shades of Nature Coin Collection. The Shades of Nature series launched in 2014 with the amazing Honey Bee. Key to the series is an exquisite micro-minting surface-finish that accentuates and emphasizes even the tiniest details in the wing of a bee, the veins on a leaf or the scales on a fish. These charges are the buyers responsibility.