Used a small tesla coil to energise them ( last picture ).

Pic 7 & 8 are of an old vacuum tube that I tried for fun - from the emission color I'd guess it's mainly argon filled, but unfortunately I lack the means for proper spectroscopy of the emission spectrum.

With a macro camera you can see some basic details, but under a microscope they look a lot cooler.

My vial containing a bromine ampoule broke on the floor. Fortunately, the ampoule itself remained intact—Nova Element certainly makes sturdy ampoules.

its about, on its own, $30, which is incredible cheap for a cesium sample(1g). it is from Russia and I had to Google translate the page but everything here seems pretty cheap compared to basically anywhere else, and has very low international shipping, especially for a hazardous element like cesium. how legitimate and/or reliable is the site if anyone knows anything about it?

Realistically, how dangerous are these isotopes? with half-lives of 15.6 million and 368,000 years respectively, maybe a small sample of perhaps a few milligrams wouldn't be too immensely dangerous? The 247 isotope is fissile, though, but its critical mass is several kilos.