Blurite rocks are pieces of scenery found in the Asgarnia Ice dungeon which give blurite ore when mined. The rocks require level 10 Mining to extract ore from. There only function is within The Knight's Swordquest, and they can be dangerous for lower leveled players to reach for due to nearby ice giants and ice warriors. They are rarely mined because they grant a relatively negligible amount of Mining XP and also because there is no known use for blurite ore after the quest has been completed.
Various old fan sites from 2001 and 2002 list the requirement for obtaining blurite ore as level 1 Mining.[1][2][3][4][5] However, it was observed to require level 10 after August 2003,[6] so either they were incorrect or it was changed in a hidden update. Some of this confusion could be explained by Blurite never appearing in the official manual.