And one of the other theories Fehmi puts forth is melting granite with solar energy and then the granite forms back into perfect granite. There is no doubt that this can be done with shaped glass. as far as melting rock. Is there some unknown chemical or other energy that can force granite into a pourable state without melting it. Pretty far out there. But most scientists and geologists have commented that granite when melted to liquid state reforms into glass or other crystals. Molten lava from what I read if it falls into cold water and solidifies that way does not form crystals as such as if it cools up on dry ground over time. Or something to that effect.
I'm sure DD would have some comments about this as well.