Worn Dragonscale

Worn Dragonscales are skinned from the bodies of Dragonkin. Even though these scales aren't pristine and shiny, these tough scales can be used for crafting armor. No dragonkin mobs have a particularly high drop rate, so collecting large stacks requires a considerable amount of grinding. Dustwallow Marsh is reputedly a good place to hunt for them. You can also occasionally find a stash of dragonscales in Knot Thimblejack's Cache in Dire Maul.

Leatherworking

 * Dragonscale Breastplate
 * Dragonscale Gauntlets
 * Dragonstrike Leggings

As a quest objective

 * Dragonscale Leatherworking (quest)