Used in:

• Gem Cutter (Tinkering)

Dropped by (***no spawn table):

• Nagafen's Lair
• fire giant warrior (4.1%)
• fire giant wizard (2.3%)
• Permafrost Caverns
• an ice giant priest (5.2%)
• an ice giant magus (4.8%)
• an ice giant (6.3%)
• an ice giant (6.3%)
• an ice giant (6.3%)
• an ice giant magus (4.8%)