I have the Unmelting Snow and the Brair Heart, but I can't get the Mammoth Tusk Powder. It does not show up anywhere. Does anyone have any tips on how to fix this? I'm playing on PS3. I can't find anything that helps.
The Mammoth Tusk Powder for the Repairing the Phial quest is found in the Stonehill Bluff giant camp between Dawnstar and Whiterun, inside a large stone bowl near the bonfire.
Also keep in mind Powdered Mammoth Tusk != Mammoth Tusk Powder. The first is an alchemy ingredient and won't work for the quest, the second is the unique quest item you need.