Behn the Prospector

Zawabi's Refuge
When you talk to him, he will tell you the following:
 * Behn: Howzat? Why, ye barely sunburned so ye must be new to the desert. Me name's Behn. I'm a miner by trade, workin' the caverns around the oasis. Slim pickings, I'm afraid, but it's too dangerous to venture into Windlasher territory. I also do a fare bit o' trade with some of the jewelry brokers back on the coast.
 * You: I brought some minerals for you to look at
 * Behn: You jumping my claim? Haha... no, no. There's plenty of treasure in that god-forsaken desert. Let's have a gander at your loot and I'll tell you if I'm interested.
 * You: Sell Behn five ingots of black iron.
 * Behn: (If you don't have the ingots) Black iron, eh? It's heavy, nasty stuff I reckon. But stronger than the iron they use back home. I'll need five ingots of the stuff. Come back when you have some more and I'll pay you in coin.
 * You: I'll return when I have it. (Walk away)
 * Behn: (If you do have five ingots) ????????????????
 * You: Sell Behn an uncut ruby.
 * Behn: (If you don't have the gem) Ruby, eh? Beautiful stuff. Lots of folks won't touch it but I've steady hands and nerves of steel. Tell you what. You come back with a hunk of the raw stuff and I'll give you a cut and polished gem.
 * You: I'll return when I have it. (Walk away)
 * Behn: (If you do have a gem) ????????????????
 * You: Sell Behn an uncut piece of jacinth.
 * Behn: (If you don't have the gem) Jacinth. Ayuh, I seen them o' them scorpion people up in the hills to the east wearin' it. Fantastic craftsmanship but I don't reckon they'd want to part with it, you savvy? You bring me a chunk of that blue rock and I'll polish it up all nice and shiny for you.
 * You: I'll return when I have it. (Walk away)
 * Behn: (If you do have a gem) ????????????????
 * You: Sell Behn an uncut fire opal.
 * Behn: (If you don't have the gem) Ah, yes. i'd love to get my hands on some nice opal. The ladies of Sharn wear 'em in their hair and most will pay a pretty penny for opal beads. Ye bring back some uncut stone and I'll take it off your hands. In return, I'll give ye a cut stone. What do ye say?
 * You: I'll return when I have it. (Walk away)
 * Behn: (If you do have a gem) ????????????????
 * You: Good to meet you, Behn.
 * Behn: Ye best be careful out there! Menechtarun is a harsh and unforgiving place, chock full of danger!