Touhng

Touhng is a type of metal recognisable by its green colour. It's softer than steel, making it unsuitable for utilities like nails, but because it doesn't corrode, is easy to repair and shape and fast to melt, it's a favourite of novice smiths. Its origin is unknown, but Tornoth mentions it's hauled by barges from The Muds. Only one object in the game is made out of it, the ancient Sejan helmet that, even after spending a long time in a dilapidated well, is in good condition without any rust.