The authenticity of euro coins can be verified by a simple visual verification of the design on the common and national sides and the inscriptions on the edge.
A more detailed authentication of euro coins involves the use of magnifiers as aids, as they are objects of small surfaces, as well as magnets to check magnetic properties.
The inner part (core) of the 1 and 2 euro coins has weak magnetic properties and can be slightly detached from the magnet while the outer part of the coins (ring) does not have magnetic properties. The denominations of 10, 20 and 50 cents do not have magnetic properties, so they do not adhere to the magnet, while the denominations of 1, 2 and 5 cents have strong magnetic properties and strongly adhere to the magnet.