u/56778rg

I'm trying to convince my friend that this is pyrite, he thinks it is gold and he wants to sell it at a very high price, can you people please help me convince my friend that this is pyrite

https://postimg.cc/bD9Lmn6r

Reddit would not let me add the photo to the post, what is the name of this piece of equipment, in excavator dumps rocks and dirt onto it and the metal catches all the big rocks filters