Antiques Dealer Buramad just sold you the second fragment. He tells you he bought it off of Zikuli the Tomb Raider, and that Zikuli probably has the last missing fragment.
Follow the road east out of Tharum, towards the Monolith, and you will find Zikuli.
Unlike Buramad, Zikuil has no intention of parting with his fragment. In fact, he wants to take yours by force (not a smart idea).
I think he is serious. Oh well, just kill him and take his fragment.
Talk to Gelminy and this quest is complete.
Sacred 2:Zikuli the Tomb Raider
Hirelings and Escorts
- Gelminy - Hireling. Immortal. Tries to fight.