0
5.7g
The coin is not silver and just face value.
The diameter of a United States 25 cent (quarter) coin is 2.426 centimetres, or 24.26 millimetres.
In the United States, the 25 cent coin is better known as the quarter. The face of President George Washington is on the front of the quarter.
Check that coin again. There was no United States yet in 1677.