Blurite ore

Blurite oreis an ore used in the hilt of the blurite sword in The Knight's Sword quest and in crossbows and bolts. It can be mined by a player with level 10 Mining, and grants 400 mining experience when mined.
Rocks containing blurite are found only in the mine in the Asgarnian Ice Dungeon, located south of Port Sarim on the tip of the Asgarnian peninsula. The Ice Caves are guarded by Ice warriors and Ice giants.