A duergar looking for some shiny stuff

A duergar has been spotted this cycle in the city, wandering around, looking at the goods and chatting with the merchants. The greedy little dwarf seemed to have obsessed over something he saw earlier. He keeps repeating to the merchants that he wants a shiny jewel with a very special gemstone on it. He spend hours and hours in the market but didn't like any of the jewels the merchants showed him. He kept saying that he needed that to make his eyes pop out and that he would look kingly with that.

Even for the standards of his race, he seemd pretty extreme.

[Looking for a ring or necklace with charisma bonuses]