Gnome Copper is a type of material used to upgrade armors. It can upgrade equipment up to 3+. After that, you must use another ingredient called Gnome Silver.
Gnome Copper can be found in a variety of ways.
- Seek around Artisan's Way (5th item in the chain)
- Do sidequests
- Loot from enemies and treasure chests
- Buy them from the equipment store in Artisan's Way.
Later in the story, Zoran will also sell Gnome Copper.