You can access the Dark Ore Mine after carrying Ferrus from the Fire Realm to the Ocean Temple after getting his letter.
But before that, you first have to carry Ferrus from the Snow Realm to Aboda Village. Did you do that part?
Once Ferrus is in the Ocean Temple, he'll give you a Force Gem, that will energize tracks leading toward the twisted tunnels. Not too far down, you'll find the Dark Ore Mine, selling 10 units of Dark Ore for 200 rupees.
To get the Ore to Linebeck, go here:
http://www.zeldadungeon.net/Zelda13-spirit-tracks-walkthrough-11.php
It's about a third down the page.
in the snow realm
It is in the fire realm the Northeastern part of the map. You get there from the Snow realm
it isnt on the island but they are gazing diagonally
You say no to all of her questions.
No. There is no underworld in Spirit Tracks. But i guess the cloest thing to it would be the Dark Realm you go to kill the final boss.
No Idea what you're talking about there are lots of puzzles
after talking to that important goron in the fire realm. they want you to bring them something cold.
Try the Trading Post. South-east end of Forest Realm.
if you want a force gem
you find him in the snow realm when you defeat the crab monster in the cave to lead to the sand sanctuary.
At the Bridge Builder's house, in south western snow realm.
i was stuck on dat as well.wat u draw is 2 diamonds beside each other.dat is it. ! /