Hardened Tortoise Shell

Source
This item drops from turtles in the Shimmering Flats, Thousand Needles:
 * Sparkleshell Tortoises (level 29-31)
 * Sparkleshell Snappers (level 33-35)
 * Sparkleshell Borers (level 32-33)

As a quest objective
This item is an objective of Hardened Shells.