Incendosaur Scale

Prior to the Cataclysm, Incendosaur Scales were sought by the Thorium Brotherhood. They no longer seem to serve any purpose beyond selling to vendors.

Source
This item drops from Incendosaurs in Searing Gorge.

As a quest objective

 * Restoring Fiery Flux Supplies via Kingsblood
 * Restoring Fiery Flux Supplies via Iron
 * Restoring Fiery Flux Supplies via Heavy Leather