I have had an idea for a new type of ore to be implemented maybe just for decorative items or to be used in an alloy of some kind: Bismuth !!! What is Bismuth you may ask bismuth is a crystal / metal that is a square crystal that reflects light but when refined it becomes a cube or rectangular thing so I was thinking how cool would it be to have squareish furniture and armor also bismuth is quite a dense metal so it could provide goodish protection
I would be happy to mod bismuth in. Just to let you know though, irl, bismuth would be terrible for armor, as it's very brittle.
