Indurium Flake

Source
Indurium Flake drops from the following troggs around Agmond's End just south of the Valley of Fangs, in the Badlands:
 * Stonevault Bonesnapper lvl 38-40
 * Stonevault Shaman lvl 40-41
 * Stonevault Seer lvl 39-40 Elite
 * Stonevault Basher lvl 39-40 Elite

As a quest objective
This item is an objective of Indurium. This quest is obtainable from Martek the Exiled in the Badlands, but has the pre-requisite Martek the Exiled (quest), obtainable from Fizzle Brassbolts at the Mirage Raceway in Thousand Needles.