Is it possible to use the [-] princesses created by an alveary swarmer to trade with apiarist villagers?
If possible, you could pretty much make emeralds from royal jelly, until the villagers trades ran out.
I was just wondering this myself today: I've challenged myself to create a Macchu-Piccu style village, then try to satisfy the trading demands of every single villager in a way that's completely automated and renewable---a totally self-sufficient, closed-system village. Princesses is the only trade I can think of that will give me problems if swarmer princesses don't work. I'm still a ways away from Alvearies, so I can't test this myself yet, but I'll try to remember to post back when I can if no one else has shed light on this!