The tools you use to eat your food, including spoons, forks, and knives, are called silverware. Some silverware is actually made of silver, but silverware made of stainless steel is much more common these days.
If you're eating with a shiny plastic fork, don't call it silverware; call it plasticware. However, if you're eating with a stainless steel fork, you can get away with calling it silverware. Traditionally, fancy cutlery (or silverware) has been made of sterling silver. This is where the word silverware came from in the late 1800s. It's such a common term in the U.S. today that many people use it for knives, forks, spoons, and serving implements no matter what metal they're made of.