The Cook Islands coin bar is an investment coin and Kurant coin that is only available in silver . The coin has the shape of a stamped bar ( coin bar ) and is the official currency in the Cook Islands . Thus, up to and including 2013, only the reduced VAT rate of 7% was due in Germany . The coin bar itself was conceived by the German coin dealer Jürgen Göbel. The Cook Island coin bar is the first of its kind, due to the advantages in terms of the applicable tax, similar products from other manufacturers, such as the Andorra coin bar from Umicore , have been brought onto the market. The coin bar was initially minted by the Perth Mint in Australia. Since 2008 he is from the refinery Heimerle + Meule produced. These coin bars are a special type of investment coins from the Cook Islands .