a fireplace

It is fashioned from stones of various sizes that have been stacked together and fastened with mortar. Its chimney is constructed likewise and leads the smoke out through the ceiling. Directly in front of the fireplace is a large hearth where you can sit if you would really like to warm up.

If you could only pick it up...

You identify a fireplace.
It is an unsellable light source.
It is very heavy.
Its keyword is fireplace.