Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative, bullion and collector coins under the authority of Niue. These coins are dedicated to historical or general popular culture themes not related to Niue itself. Many of them are made using "smartminting" techniques and have features not generally found in circulation coins - e.g. high relief, full colour printing and/or different forms, including fully three dimensional (3D).
Some coins are marketed in standard bullion sizes, like half ounce silver, one ounce silver etc, and some of those are also denominated as $1, for which see respective lists; this particular coin denominated as One Niue Dollar is not in a standard ounce-based size.
This coin is part of the Forest Babies series and features a Roe-Deer.
The Mint says about it:
"The Mint of Poland is proud to present a coin of the fascinating Forest Babies series which is dedicated to the roe-deer. The coin is offered in an offbeat packaging in the form of a colourful cardboard book, designed specifically for this extraordinary series. The highest aesthetics and out-of-ordinary theme of the coin, along with the spellbinding natural charm of the baby roe-deer, makes it an unforgettable gift and remarkable collector's item." | 
Search for Niue: One Dollar Silver 2014 Roe-Deer on eBay 
