• Design: Defender's Twilight Opal
• Item Level 80Disenchants into:
  Not disenchantable
• Binds when picked up
• Requires Jewelcrafting (390)
• Use: Teaches you how to cut a Defender's Twilight Opal
• [Defender's Twilight Opal]
• Requires Twilight Opal
• Sell Price: 4

Source

This item drops from the following mobs in The Storm Peaks:

• Stormforged Champion
• Stormforged Ambusher
• Stormforged Artificer
• Stormforged Infiltrator

External links

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