What minerals are found in the fork?

"Fork" isn't a thing. I mean, a fork is a thing, but it's made of whatever it's made of: wood, metal, plastic, whatever; what elements are found in it will depend on what it's made of. (Metal forks are usually mostly iron; silver is a possibility, but a good deal of "silverware" is really silver plated over a base metal. Plastic forks are typically mainly carbon and hydrogen; wood forks are mostly carbon, hydrogen, and oxygen.)