I believe you can get uncultured pearls from synthesis. I think you should say something like a buffalo horn if you are talking about getting an item from battle that you cannot get by other means.
My point was though, that if you could gain sp in the amount that you do crafting and battlecraft that a lot of people would start doing it in order to avoid the costs of buying those items from the gatherers we have now. It's not a matter of if they like it or not, (like it is now), it's a matter of: it would save them loads of money and not at the cost of the time the gatherers have put into their classes, (again, like now.) If they suddenly increased the amount of sp you can get from gathering to a drastic amount liken 700 sp per successful hit (basing this off of how much I could get grinding particular items or mobs) don't you think that would be pretty unfair to the people that have gotten their gathering classes up high enough to make a profit in this economy only to be closed in on by all the people that would then swarm to gather?