Euro coins edge of the €2 coin also protects it from counterfeiting. Euro coins were designed in cooperation with organisations representing blind persons, and as a result they incorporate many features allowing them to be distinguished by touch alone. In addition, their visual appearance is designed to make them easy to tell apart for persons who cannot read the inscriptions on the coins. The coins increase in size and weight with value. Of the eight denominations of euro coins, the three lowest denominations are small, resemble copper in colour and are quite thin and light. The next three denominations resemble gold in
Euro gold and silver commemorative coins (Estonia) Euro gold and silver commemorative coins (Estonia) Euro gold and silver commemorative coins are special euro coins minted and issued by member states of the Eurozone, mainly in gold and silver, although other precious metals are also used in rare occasions. Estonia joined the Eurozone on 1. January 2011. Since then Bank of Estonia has been issuing both normal issues of Estonian euro coins, which are intended for circulation, and commemorative euro coins in gold and silver. As of January 2011 there has been one commemorative coin set released. The following table shows the number of coins minted per year.