I'm a chemistry nerd natively.
Evidently I make icons now. I'm pretty decent at it. I can't make one if I don't have a base image, which I usually pull myself, but I'm handy enough with GIMP that if I can get a good resolution version of one that needs cleaning up, I can and will alter it upon request.
In case anyone was wondering, the plural of codex is codices, and foci is a plural of focus, especially in mathematics.