• Adamantine Chain of the Unbroken
• Item Level 110Disenchants into:
  [Void Crystal]: 1-2
• Binds when picked up
• Unique
• Neck
• +19 Stamina
• Requires Level 70
• Equip: Improves critical strike rating by 30.
  Equip: Increases attack power by 34.
• Sell Price: 8 83 55

Source

This item drops from Quagmirran in The Slave Pens wing of Coilfang Reservoir on Heroic Mode.

External links

• Battle.net (EU)
• Wowhead
• Thottbot
• WoWDB