• Crystallized Firestone
• Item Level 391Disenchants into:
  Not disenchantable
• Binds when picked up
• Requires Level 85
• Sell Price: 5

Used to upgrade any item level 378 Tier 12 Valor point items to their heroic item level 391 version.

Source

This item drops from the bosses in the Firelands raid instance on heroic mode.

Patch changes

• Patch 4.2.0 (28-Jun-2011): Added. 
  

External links

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