Hmmm. #vivianite vs #cavansite is not a very chaotic matchup at all - they're both very pretty and fairly rare, the latter moreso than the former, but not very chaotic.
Cavansite owes its gorgeous blue to vanadium, but it's too rare to be a common ore, so it's more usually a collector's mineral. And vanadium isn't really much fuss until you process it, as far as I can tell; just exercise a little common sense in handling, per most minerals. (c) #MinCup23
Now then, I'm probably going to vote #vivianite because sure, it's not very chaotic... but it is *EXTREMELY* light-sensitive. It will start darkening basically the second you expose it to light. Wild, right?
Also, apparently it likes growing on and in fossils and bones. That's just badass. Vivianite for the win. #MinCup23
Oh I didn't explain why light sensitivity got my vote: I too am very light sensitive. At least the #vivianite doesn't get migraines. #MinCup23