So with minimal research, I have found that by rapidly cooling felsic molten material, obsidian is formed... any specifics I should know before I continue?
Nextly, granite is a common felsic material, so if I were to melt it in an industrial kiln, or more likely, with thermite, and then gently pour cool water over it (say it was in a mold), then would obsidian glass over? Could I mold obsidian shapes?
There has to be something wrong with this process, there always is. What is it?