Region: Thaleia. Dungeon. Level 16. The Coris Mine can be found in Thaleia, in the mountains of Cydonia. Take the western route going to the north, then follow the route to Kalla's Temple to find the Coris Mine just above it.
Ore Info: Smithing Stone, Black-Sand Steel, Windstone, Thunderstone, Sunstone
Smithing Stone, Thunderstone, Windstone, Black-Sand Steel, Sunstone
Vulnerary, Archer's Ring, Large Coin
Also on: Theodora's path, Dietrich's path, Part III