a black and silver key

This key is made of black metal. Silver inlays form small lines from the handle all the way to the blade where they split and follow the edges.

It is a black and silver key.
It weighs half a pound.

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