The Steel Alphabet from the Mistborn book series. I haven't done all sixteen metals yet, but so far we've got: Top row (left to right): Iron, Steel, Zinc, Brass Second row: Tin, Pewter, Copper, Bronze These are the symbols that represent the different magical metals of the Allomancy magic system. So far nothing to do with the project other than look.
I of course must credit Brandon Sanderson for writing the awesome Mistborn (and other Cosmere) novels, as well as Isaac Stewart for designing the symbols (so clever, the way they are designed to look like metal components: cuffs, nails, and beads). You yourself may use these recreations I drew, but please give credit.