Alright, he's liking what he's hearing here. Not the part about diamonds being easy to replicate, but the rest of it is good.

Well not the gold being worthless thing either. Okay, the only good thing is the rarity of this mercury shiny thing that gets mixed with gold into bars. THAT is good. He is intrigued.

"So there's still an economy in your world? I thought you said everything was free."