First post here as an r/dicemaking refugee, glad this place has a similar community!

So I’ve got a friend who is both a standard nerd and is also deep into Harry Potter. I’ve had the idea to make them a set of four d20’s, each with coloring and patterns appropriate to the Hogwarts Houses, and maybe make a wooden/3d printed stand to display them on.

The biggest problem I’m currently facing is how the heck to get a bronze color/effect for Ravenclaw out of ink and mica powder, but I’m also open to any other generic style ideas.

Thanks!