Steve wandered into what seems to be a village. A tribe or group with long noses, green eyes, brown skin and somewhat outrageous trade offers. Steve did not know what an emerald was. But the voice in his head told him to steal some crops and trade them with a farmer. "I think it's the one with the straw hat". Steve heard this voice and did as he was told.
It was weird how the villager accepted the trade of his own crops for an emerald. After trading, the farmer continued to farm. Replanting the crops he farmed. They must be mentally retarded or something. The voice was laughing at them. "Wow, what idiots. Hah!".
After some thorough trading, Steve concluded that paper is the easiest source for trade.