Ask Pandrik the Wise about the Dragon's Eye Stone.
"[...] Hmm. It is a sin to make false accusations without being sure. And to suspect neighbors of a crime without proof. But ... Don't take me for an evil gossip, but ... If something is stolen, it seems perfectly reasonable to ask the thief about the loss. That's all I can do to help you today, warrior!"
Visit Gloum the Swindler and ask him.
Gloum offers you the dragon's eye in exchange for 50 gold or 300 Platinum Thaler.
Note: If you hand over the gold or the Platinum Thaler to Gloum the Swindler, you will immediately receive the dragon's eye and the stolen gold, as well as the achievement:
AND 
OR in return you work through a list of tasks.
The decision is up to you.
Tasks on the to-do list:- Bring wax from the Zigred Hive - 3 pcs!
- Obtain skin from the abdomen of the Spider Patriarch!
- Give the message to Akvarius!
- Take the chest to the Antiquarian!
- Visit the bouncer at the tavern!
After completing each task, go back to Gloum the Swindler. "[...] Here you go, the dragon's eye. Take it, warrior, like a brother! And here's another bar of gold for you - so the jeweler has something to make a ring out of. Thank you for your help. Come by again!"
Received: Dragon's Eye 1 pc,
Recieved: Stolen Gold 1 pc.
Achievement: 
Go to Esmeril the Juweller and ask for a ring to be made.
"[...] Oh, an extraordinary piece of jewelry! Allow me ... Oh, could it be ...? The dragon's eye? I've heard a lot about it, but I've never been allowed to hold one in my hands ... [...]"
Deducted: Dragon's Eye, Stolen Gold
Received: Dragon’s Eye Ring 1 pc.
Return to Elendiyar the Keeper.
"[...] No, no, warrior. That is truly a masterstroke! You've made my day. I'm even a little embarrassed ... No big deal, I know how to repay you. Take this. May it be your reward. Even if it's not even a tenth of my gratitude! Thank you very much, you are my hero!"
