I don't know what the deli makes yet. But the jeweler makes earrings and a ring that I've seen so far. I've been having them popup as requirements for my deliveries. Which is a pest, because I'm two expansions away from reaching the mine. Tried to sell ten green maps to myself and someone snatched them up before I could! I cry...
The mine give you different elements, which is then used the forge to make nails, screws, hammers, etc. I find getting the yellow and green maps come far easier than the ones with the red watermark. I've gotten more pain from fishing and the butterflies than anything else. We seriously need more ways to obtain certain things. Shovels are so cheap to purchase or sell, but are the most rare item to stumble across. I've no idea.