Gem Caster

I was sent to a new world along with seven other people to become a hero that will do battle against the forces of darkness.Unlike the rest of them, my abilities relied on gemstones. Lots of gemstones, with only an ordinary long sword and my wits and creativity to help me grow strong in preparation for the upcoming battles ahead.Thus, I've decided to abuse it for all its worth, hopefully netting a fortune from selling said gemstones and funding my own private army. Or town. Or anything else that can be brought with money.Really now, a hero who can grow rich just by using his abilities alone? I'm game.As for being a hero, well...how about I pay you to be one?