"Things You Wouldn't Know If We Didn't Blog Intermittently."
A couple years ago you had a photo of one of these amethyst geodes that was purported to be the worlds largest and I posted saying I'd seen larger.Not this time.
I'm amazed some crew was able to transport it out of a mine.
My comment on Twitter, linking to this post: "Seems a pity that this is far too precious to play in. Looks like wormhole entrance, but space travel games are out."
"“The thing’s hollow -- it goes on forever -- and -- oh my God! -- it’s full of stars!” (David Bowman)
Found this photo and similar ones the website of a company in Uruguay that is a mineral wholesaler:http://www.lestageminerals.com/en/Empresa
Found this from April 2014, but doesn't show source...http://franciscobostromgemosofia.blogspot.com/2014/04/cielos-violaceos-de-ametista-en-geoda.html
Probably taken in Tucson AZ. Biggest Gem and Mineral show in the world takes place the first 2 weeks of Feb. all over Tucson AZ, every year! check it out: https://www.visittucson.org/visit/events/featured-tucson/tucson-gem-mineral-fossil-showcase
This is a worthy search problem. So far I have found this young woman standing in front of the same formation and this youtube video of possibly an even larger formation.