Trade ya.
At least I know how to pick Mjollnir up...
Funny, you'd think it'd be reversed, and Mjollnir would be the one no mere human could lift. Though to be fair I know nothing about the lore behind DS, so maybe that makes sense, too...
My Armorer Gold must be from a previous version, since it's listed as achieved. I kinda port my player file between versions, because I'm too bad at the game to re-do everything every time. I'm still not clear on how either blocks the other, though - when you find them all once, you get gold. When you find them all three times, you get diamond.