Design: Guardian's Nightstone

• Design: Guardian's Nightstone
• Use: Teaches you how to cut a Guardian's Nightstone.
• 

  • Guardian's Nightstone
  • +30 Expertise Rating and +23 Stamina
  • Requires Item Level: 285
  • "Matches a Red or Blue socket."
  • Sell Price: 75
• Nightstone
• Requires Jewelcrafting (425)
• Sell Price: 75

Source

This design is a world drop from 80+ Cataclysm mobs.

Patch changes

• Patch 4.0.3a (2010-11-23): Added.
  

External links

• Wowhead
• WoWDB