a jade-encrusted key

The tiny key is made of a light silvery alloy. Its handle is encrusted with
jade that glows with a soft shade of green.

It is a jade-encrusted key.
It weighs a few ounces.

You identify a jade-encrusted key.
It is an unsellable key.
It weighs four ounces, and it is worth about ten celeb.
Its keywords are key, jade, and jade-encrusted.