> That's pure uranium,

Not exactly.

Yellowcake is about 80% uranium oxide:

"Triuranium octoxide (U3O8), the most stable uranium oxide; yellowcake typically contains 70 to 90 percent triuranium octoxide)"

https://en.wikipedia.org/wiki/Uranium_oxide

The atomic weight of Uranium is 238; the atomic weight of Oxygen is 16. By weight, Triuranium octoxide is ~84% Uranium. Even if you're only counting the uranium in the Triuranium octoxide, that's still 60+% of the total mass coming from Uranium Atoms. I'd take that purity any day.

purity invites gradation; 'pure' does not.

United Nuclear has it for sale. No more dangerous than ore samples unless you cut a line and snort it.

Bob Lazar's company. That's kinda cool.

Yeah and you can even buy it directly online. https://unitednuclear.com/restricted-to-ups-only-c-105_87/ye...

Oh no, don’t link United Nuclear! To paraphrase an xkcd: “it’s like rickrolling, but the victim’s stuck all day”

According to that link that's for dispersible form (gas, powder) – it's up to 7kg in solid form ¯\_(ツ)_/¯