I've updated the OP to have all the stones in it, there are only two (iirc, I'm sleepy) that don't have an exact location listed (Aerodactylite and Ampharosite) because the ones provided were too vague for me. If someone can come up with a concise description for either of them, be my guest, otherwise I will make them up when I get to them. I'm about to whoop Aqua's butts in the Seafloor Cavern so I've only been able to confirm all the pre-CoO stones myself and I was able to determine exactly where the rest are and write my own entries thanks to the descriptions provided by
DragonWhale and
CarbonDuck (thanks a lot for your work!).
So if we can get the descriptions for Aero and Amph stones then the alphabetical list will be finished (sans errors / typos I haven't picked up, anyone wanna GP it? lol)
Next, I want to create a list of stones available for use during the storyline (up until the Champion battle) in the order they are obtainable. Hopefully this will create some discussion as we try to determine the actual order, because you can sorta freestyle the way you go about Hoenn (especially the stones available
after CoO as most require backtracking). I'm sure this will give you something to do now
Karxrida lol. Also gonna go ahead and tag
Celever because I feel like this list in-particular would be helpful to the in-game tier list... (even though it hasn't even been started yet)