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 coins a €10 Finnish commemorative coin cannot be used in Portugal). However, these gold coins are intended for collectors as their bullion value vastly exceeds their face value. Some silver coins, such as the German €10 commemoratives, are often available at banks and some retailers at face value. These coins, however, generally do not circulate but are kept by collectors. It is uncertain whether the Council of Ministers will grant them legal tender status elsewhere outside national boundaries, as San Marino, Monaco, and the Vatican City also issue this kind of coins. The Belgian 2.5 euro coin is a commemorative euro