You got to love the US

[BrianSoddingBoru4]

Yes.  Yes you can.

https://www.amazon.com/Images-SI-Uranium...ullets-btf

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Boru

Except the label, nothing about that amazon item says it contains mainly uranium.

In fact the description says the stuff was not chemically analyzed, so source of its low level radioactivity in the substance is not determined, and can be a host of elements besides uranium. 

Real powdered uranium ore, commonly called yellow cake, is 60-70% uranium.  Natural occuring uranium consist mainly of the isotope that does’t Go boom or power nuclear reactors, so although uranium ore is radioactive, it’s radioactivity is so low is it entirely safe to handle any amount without any safety equipment.

I have been able to find no evidence that yellow cake is a controlled substance and could be illegal to either acquire or even make.

There are two steps in uranium refinement.   The first step is to chemically separate naturally occurring uranium from the ore to get a solid with high amount of chemically bounded uranium.    This is easy to do, the source of raw material is common to find, and the result is harmless, so probably not illegal to possess.

The second takes the high concentration of uranium, and use physical methods to separate out fissile isotope uranium 235 from the predominant but non-fissile 238.   This is what is Iran is trying to do, and the result would likely kill most people who might attempt it with knowing how to do it, and that is without causing anything nuclear.

Fair enough.  I suspect that the Amazon item is likely pitchblende - active enough to set off your Geiger counter, but not active enough to get a hazmat team to cordon off your house.

And you're correct - the Amazon thing aside, there are plenty of places to purchase yellowcake.

Boru