Shygun

Just as a reminder, if your trying to stick to the time/lore of the books, Aluminum is NOT native to Roshar. the book even mentions that it can only be soulcast. (and that would be with an amethyst Gem for metal.) So this could be a fun side quest for a GM for their players to try to 1) find out what aluminum is, 2) acquire some Aluminum for a "seed" and 3) either find someone who can soulcast metal or find an amethyst (either from a mine or killing a large enough creature that have a Amethyst for their Gemheart) for a soulcaster to use.