2 veins just outside Fort Neugrad. Access through the prison basement, across the small pond in the basement and then continue across the lake outside. You can also reach these veins by exiting the fort through the log wall to the north. Then turn east toward the lake and follow the shore a short distance until you see a path that heads uphill.
1 vein located directly west of Falkreath. From the end of the stone fence on the right at the west exit for Falkreath, directly west until a rock is reached. Proceed to the right of the rock, directly west until the cliff. The vein is visible to the north, underneath a rock protrusion.
1 vein located almost directly south of Angi's Camp, in the mountains, almost at the edge of the playable area. Look for a small canyon in between two mountains.
1 vein in an unmarked location named Frost Troll Den: Uttering Hills, directly south of Anga's Mill, southwest of Windhelm, in a crevice marked with a flagpole. (Same entry under corundum ore - directly south of Anga's Mill, southwest of Windhelm, in a crevice marked with a flagpole. Climb the mountain south of the mill until you come across an alcove with a frost troll in it. The crevice with both is south of the alcove below the flagpole.)
1 vein outside Darkshade, to the right of the cave entrance.
1 vein directly Northeast of Dawnstar on a very small island. Northeast of a large snow-covered island.
*Disclosure: Some of the links above are affiliate links, meaning, at no additional cost to you, Fandom will earn a commission if you click through and make a purchase. Community content is available under CC-BY-SA unless otherwise noted.