What does the old man do when John says he (the old man) looks like he hasn't eaten in two months?

After John's comment, the old man's eyes fill up with tears, and he doesn't speak for a short moment. When he finds his voice again, the old man tells John and Lorraine to go home and to not waste their time with an old man.
He then turns to enter his home. Before he shuts the door, however, John's eyes catch sight of the beautiful gold chain around his neck. After John asks the old man about the rock that is attached to the chain, the latter hints that it is an important artifact. He then turns to enter his home once more. This time, however, he leaves the door ajar.
John and Lorraine enter behind him. During the visit, John offers the old man some fudge they have brought over, and the latter expounds upon the significance of the gold chain and attached crystal artifact.