Very nice Abbasid coin. I can't tell if it is silver or gold. The similar silver coin in my picture sold for $95 US dollars at auction. it is from Umayyad al-Walid I

We have a page with general values for silver coins:

https://coinquest.com/cgi-bin/cq/coins.pl?coin=20652

Your coin is in excellent condition. If genuine, I'd estimate $150. Don't clean it.