Are Buffalo Nickels Silver?

By GovMint :

Buffalo Nickels, commonly called Indian Head Nickels, were not made of silver. Instead, these distinctive coins were composed of copper (75%) and nickel (25%), giving them unique appearance and durability. The iconic Buffalo Nickel design, which depicts a buffalo on its reverse and Native American on its obverse, has captured the imaginations of collectors and history enthusiasts since its introduction in 1913.

Sources Used:

https://www.cnn.com/style/article/buffalo-nickels-coins/index.html