WotLK Mage Spell Conjure Mana Gem bugged

[escudo]

Mage Spell Conjure Mana Gem bugged, when i try to use it saying i already have gem but i dont have any in my bags, i chek 100 times, relog dont help.

[Thorbjorn]

Check your bank aswell.

[escudo]

Check your bank aswell.

Thanks, that was the problem.