Question: how is 1 euro coin?
Answer: The 1-euro coin (€1) is a euro coin with a value of one euro. It is made of two alloys: the inner part of cupronickel, the outer part of nickel brass. ... As of July 2019, there were approximately 7.5 billion one-euro coins in circulation, constituting 25.3% of all circulated euro coins by value and 5.6% by quantity.