What generates gems?

[Endoperez]

JimMorrison said:
Well it's easy to tell how many you get if you aren't generating any of that type, otherwise you may not be keeping such a close eye on it.

That's an interesting test Endo, I think I might do one as well, I'll brb with it.

Did you follow the link at the end? Those are the least detailed results out of three or four similar tests I made.

Terrain affects the results. Especially gold, because if you get 5 farmlands out of 9 provinces you'll have more money than those who have only one or two farms, even if they had better scales. Events are also affected, but except for coastal provinces I didn't notice anything spesific. Coasts are good: you can get sirens, heap of water gems, blood slaves from the slave vessels, etc.