Metal Parity (Idea for Upcoming Game Drop)

I hope we get metal parity. Like we should get gold bars, copper bars, iron/gold grates, ect... It would also be cool to get black iron bars, jail cell like black iron doors and a trap door, resembling a sewer grate, maybe crafted with the chains (since they are a black iron).

This idea came from traveling the UK. Much of the fences are black with gold highlights. By creating metal parity with things like metal bars, it can open up so much room for builders and seems like an easy add to this game drop. Just need to retexture items to new metals and would be very much appreciated.