I find it hard to believe that no one on here has an opinion on these things! Someone on a FB group introduced me to the term "ventifact" meaning wind-blown. Does that sound right? Has anyone seen stuff like this before?

I know the guys who collect these and they are definitely not tumbled or polished. I think they're "ventifact" or basically sand-blasted into those awesome shapes. Then there's the cool dendrites and plumes and betroidal (?) inclusions. I'm thinking they must have formed in volcanic rocks? Definitely cool stuff, although I was really hoping for some more scholarly discussion on here...

Well a little berating goes a long way around here.
Welcome to the Board, jrh4.
The main reason I did not comment on these pieces is because you were all ready seeing much more in them than I can from the pictures so I didn't have much to add, and I thought Laurie's reply was gracious and spot on.
I'm guessing it's the fine natural polish on these pieces you find most attractive and interesting. Indeed it is!
Botryoidal formations in agate are pretty common and a lot of chalcedony is fluorescent. Just Google "botryoidal chalcedony" for some great pictures. Are you comparing this with the famous Montana Moss Agate? The chalcedony looks very similar. The botryoidal formations are a little more rare in that material but not unheard of. Very hard rock. It would've had to have been exposed in ideal conditions, a windy sandy surface for a very long time for it to be called a ventiform, so you would have to know exactly where it was found. Water wear is more likely. And you have the natural conchoidal fracture of the chalcedony to consider.
It would be nice to see some larger pieces of it. Are they from nodular agate formations or veins.?
I would be interested if there is any "iris" agate in any of those pieces but you would have to cut them to see and I know you do not want to do that.
And I have to ask, where does the allusion to meteorites come from?
Nature does some wonderful things. Thanks for the pics!