We need a manufacturer of jewels, and a retailer for jewelry!
Also, we should have suppliers to the manufacturers. Low profits, kinda like a mine, maybe new in-game plot twists? (What if suppliers only sell in the global market?!?!?!)
I think it could make for some interesting game-play. Maybe make it where raw materials are randomly placed throughout the map each cycle, so maybe operating a supply business might not be feasible in certain locations. Would also have affects on Supply and Demand.
Just a cool idea I was thinking about whilst sitting here on GoVenture lol.