I believe there are 11 ore pieces (1+2+3 for armor and 2+3 for sword).
I was only able to find back 9 locations so I'm still missing 2 but I got them all on my save.
•Rogentia:
-NW cave (wind+fire+nature) 2 golems
-W edge cave (fire) 1 golem
•Fageda:
-E center (fire+ice) free standing in the forest by the poison lions
•Draganeu:
-NE cave (fire + earth) cave behind a breakable wall
•Cales:
-SE island (water) 1 shark
•Essedegat:
-N cave (ice) 2 golems
•Tramunt:
-central cave by the horizontal wind (fire+wind) some shield enemies
•Vil'laraig:
-NW cave (earth+ice) 1 electric bear
-VIP shop for ??? coins