There is a little
Dungeon 100 offers us an adventure to the palace of Queen Lich in Tu & # 39; narath, built on a dead god known only as The One In The Void. The caverns under the palace lead to the petrified heart of the faded god, which contains chambers full of emotion, ectoplasmic debris, and in one place the "breath" of the dead god, which provides a unique permanent benefit for the characters who find it.
… but not in terms of the material
If you are looking for uses for the god-rock or the dust of God or what you have … with what I cannot help you. The unique properties of the Lich-Queens palace come from the obsidian-like material of the one who built it and the large amount of spells it imposed on it.