an old iron key

The workmanship is strange, heralding back from the northern realms. It has been blackened by the centuries, yet it has not rusted in the least. Strangely, it is very cold to the touch.

It is an old iron key.
It weighs about one pound.

You identify an old iron key.
It is an unsellable key.
It weighs one pound and two ounces, and it is worth about two celeb and fifty busc.
Its keywords are key, iron, ancient, and old.