One piece I managed to get up there is a Kokoba beta release. Judging by the design this is probably from 2011? Or so?
|Truncated Bohr Radius Bracelet by Kokoba|
The number featured is a truncated version of the Bohr radius. I don't usually like truncating the physical constants if I can help it, so I suspect this was a stash buster to use up the rest of some supplies (probably the lapis beads used in between digits). I always have loads of amethyst in my bead box.
(Incidentally, Steven Universe has made it a lot more exciting to just casually mention gemstones in my posts, haha. I wish I could hang out with Amethyst in real life!)
A few years ago I made an effort to branch out into other numbers/constants. Years later I'm not sure which ones I should focus on. The Bohr radius seems a little obscure—maybe I would be better off sticking with G and c? I don't know. Thoughts?