How do you put nuggets in the crucible?

[ImminentOrbit]

Trying to mess with copper for the first time and finished firing my clay crucibles. But, I don't know how to fill them. Doesn't look like a recipe, nor does placing the crucible down on the ground allow me to place anything inside it, it just picks it back up.

[ImminentOrbit]

Ah, looks like it goes on the fire pit. Nevermind.