[jschwartzi]

Just a nitpick but the process of crystallization evolves energy rather than involves. So it’s proceeding to a lower-entropy state. If we wanted to trigger such a transformation we’d have to involve machinery so you’re right in that sense. But there are other ways in which the universe stumbles into lower-entropy states sometimes, including crystallization from a super-saturated solution. Super-saturation could be driven by something as simple as the day/night cycle