what are quarters made of

Quarters in the United States are made of a combination of metals. The current version of the quarter is composed of two layers of cupronickel, which is 75% copper and 25% nickel, clad on a core of pure copper). This composition makes the quarter durable and resistant to corrosion, which is important for a coin that sees heavy circulation in daily transactions. The outer layer of the quarter is a nickel-copper mixture that is silver in color, while the inner core is pure copper. This combination of metals ensures that the quarter remains a workhorse coin in the United States monetary system, as it is widely used in various transactions and machines, such as vending machines, toll plazas, and shopping carts.