• Coil of Missing Gems
• Item Level 219Disenchants into:
  [Abyss Crystal]: 1-2
• Binds when picked up
• Neck
• +54 Stamina
  +42 Intellect
• Requires Level 80
• Equip: Improves hit rating by 38.
  Equip: Improves critical strike rating by 41.
  Equip: Increases spell power by 70.
• Sell Price: 7 56 23

Source

This item drops from the Devourer of Souls in The Forge of Souls.

Patch changes

• Patch 3.3.0 (08-Dec-2009): Added. 
  

External links

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