"Okay, I guess 'at's everybody!" Cas exclaims.
"The shop is in the market." He says. "Follow me!"
With that, he heads off towards the center of Orussus. Following him, you find that the market isn't very far from the Red Dragon. After traveling only a few streets, you find yourselves in a huge bazaar, packed full with people. Cas slows down, ensuring that you're able to keep up with him.
After being jostled many times by the crowd, you manage to emerge on the other side. Cas points to a small shop, nestled amongst several others; it bears the sign "Jamaris' Jewelry."
"That's the one!" Cas exclaims. He then enters the shop, holding the door open for the group.
Inside, the shop is relatively small. Several counters, made of glass, are set throughout the shop; each of these contain a variety of jewelry, ranging from cheap trinkets to what look like well-made necklaces and bracelets of gold set with various gems. In the middle of the shop is a glass podium, with many locks and latches; however, whatever was held in it before is obviously not present. There is a small door in the far back of the store.
"Cas, is that you?" A voice calls from beyond the door, slightly muffled.
"Yeah! Jamaris, I found some adventurerers for you!" Cas yells, and shuffles his feet.
"Good!" The voice calls, and the door in the back opens. Out steps a tall, thin man. His hair is graying, and his face shows that he is middle-aged.
"Good." He repeats, taking a look at the group. He then approaches you.
"I am Jamaris, and I am the owner of this shop. As I'm certain Cas has told you, we are missing a valuable gem. You are willing to find and return it?"