I like this idea, but one thing that would even be cooler is if they add special gems that belong to the Conan lore. Now they already have a lot special Conan related treasures included in the game, but if this were to be upgraded I think the short stories and comic books could provide a lot more unique gems, treasures and trinkets to collect that belong to the Conan universe.
Conan is obviously no stranger to regular gems and gold, how many people has he robbed, tombs has he looted, things stolen lol? All those gems would be cool, but I read one comic where Conan has a mission, he needs to retrieve a type of red cone shaped stone, very rare and hard to get but once used, in the story, it gives vitality. The woman sending Conan to get these stones has been using them for centuries to stay alive…so…use it once to revive a dead thrall maybe? 
I totally support your idea, and maybe we could use some of those stones to add variety to the set of clothes we got in the Derketo dlc. Those small bracelets and earrings are hard to see. If you could add cool rubies and emeralds to them while crafting them and see them sparkle on your character or thralls, that would be great.