I met Simeon the philosopher.
He asks me 2 malachites.
After accepting the quest I go back to the battle tower, get 2 malachite, come back.
When I talk to Simeon I have no dialog option to finish the quest.
I can only tell I will come back later.
Imarion
Are you sure you got Malachite
Gems and not Malachite
Ore? (it is the gems you need, and they are hard to find)