a small silver key

This small key appears to be made from silver, as cloudy black streaks are beginning to mar the surface, dulling the shine of the metal. Its small size suggests that it fits a small lock, perhaps on a chest rather than a door.

It is a small silver key.
It weighs half a pound.

You identify a small silver key.
It is an unsellable key.
It weighs eleven ounces, and it is worth about one celeb.
Its keywords are key, small, and silver.