I just created some new seamless fantasy stone textures as well as some fantasy metal images...they are free to use with attribution. They live here:
https://soundimage.org/txr-rock-stone-fantasy/ https://soundimage.org/txr-metal-seamless/
Feel free to edit, create maps from them or whatever you like. :-)
Over 4000 more free images await you on my site. I do custom work as well if need be. Enjoy!