Changed from Classic: highlighted lines below differ between the two clients.
Data source: game client item records. Forever build 1.60.1.70888 ; Classic Era build 1.15.9.70576 . View the compiled item record . A beta record does not confirm in-game availability. Verify acquisition in the game and official announcements.
Classic 1.15.9.70576
Major Firestone
Binds when picked up
Unique
Held In Off-hand
Equip: Gives the main hand weapon a fire attribute. Each attack has a certain chance of causing 80 to 120 additional fire damage to the target.
Equip: Increases the damage dealt by fire spells and effects by up to 21.
Forever Beta 1.60.1.70888
Major Firestone
Binds when picked up
Unique
Use: Enchant your weapon with fire energy, increasing the critical strike chance of your spells by 2%, and increasing the damage dealt by your fire spells by up to 21.