Incendicite Ore

Incendicite Ore is an ore that can be mined with 65 skill or higher. It is actually a quest item and not technically an ingredient since it can't be used in any recipes. It also can't be crafted into any a bar of any sort.

Source
Incendicite Ore is mined from Incendicite Mineral Veins in the Wetlands.

Incendicite Ore as a quest objective
Incendicite Ore is used in the quest, starting in Dun Morogh.