You need a jeweler to make the polished opal (you can find UNpolished opals by mining barrow-iron ore/silver), and you need a metal smith to make the iron band.
Kin - Spartans
Raid Group - you know if you know
Master Westfold Tinker - Always willing to trade my jewlery for anything you have available! Also Rank 6 in PvMP
Minnieme - Hobbit Burg Lvl 75 Master Westfold Tailor
Goatster - Elven RK Lvl 30 Westfold Scholar
VanGoat- Lvl 22 Dwarf Mini woodworker