Coin Values

There was private minting going on in California during the gold rush, and uncirculated specimens can be worth a few hundred dollars. Yours, however, in addition to being heavily worn, looks to be a gold-plated novelty copy. In that case it won't be worth anything.

That said, it's impossible to verify this with photos. If you have any doubts, take it to a licensed coin dealer so they can inspect and weigh it.