• Heliotrope Cloak
• Item Level 60Disenchants into:
  [Large Brilliant Shard]: 1 (99.5%)
  [Nexus Crystal]: 1 (0.5%)
• Binds when picked up
• Back
• 43 Armor
• +10 Intellect
• Requires Level 55
• Equip: Increases your critical strike rating by 14.
• 
• Sell Price: 1 45 42

Source

This item drops from:

• Guard Slip'kik in Dire Maul
• Guard Mol'dar in Dire Maul

Patches and hotfixes

Patch 1.3.0 (07-Mar-2005): Added 

External links

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