If you are referring to a Washington Quarter that was minted from 1932-1964, it contains: 90% silver and 10% copper.
If it was minted from 1965 to the present, the composition is: 2 outer layers of 75% copper and 25% nickel bonded to a pure copper core, for an overall percentage of about 92% copper and 8% nickel.
The US quarter contain 91,67 % copper and 8,33 % nickel.
1796
No US quarters were made in 1810.
A quarter is made of 91.67% copper and 8.33% nickel. However, before 1965 quarters were made of silver.
The first US 25 cent coin (quarter) was struck in 1796.
The coin is made of 90% silver & 10% copper.
A US quarter dated 1915 does contain 90% silver, so yes it is silver
The first US quarter was made in 1796, look at the coin and post new question.
The US did not mint regular issue quarters in 1975. Bicentennial quarters were made instead.
The Philadelphia Mint made 809,764,016, the Denver Mint made 860,118,839
Oudin
US coins are not engraved, they are made with dies. The first was in 1796.