Just the facts:

Beryllium Definition & Meaning - Merriam-Webster

Eighty-seven percent of the world's supply of beryllium is mined in Utah. It's an important additive in alloys of copper and steel, used in reactors and nuclear weapons, X-ray tubes and the magnetrons of microwave ovens. It is a listed carcinogen, so use appropriate measures when handling or working with beryllium. 

Fun story: As a young nerd, I built a collection of element samples. I had small amounts of various elements in glass vials. Some idiot told the Resident Ass...sistant in the dorm I had dangerous, possible bomb making chemicals in my dorm room. On the way back from my networks class, I was tackled and arrested by a couple of deputy sheriffs.

After viewing what I had, one of the chemistry professors told the cops that what I had was harmless and stored appropriately. No bombs or nefarious things could be done with the small samples I had. It was a false alarm and no terrorist bombs could be made with it. They were still a little freaked out by the uranium ore and thorianite being slightly radioactive. Thankfully, they let the bong slide.

What's a few alpha particles among friends?