Z is for Zaffre, alchemy, and coming full circle in the end

We started the month with blue, and we end it with blue as well. I totally planned it that way.
(I didn't.)


Zaffre is a shade of dark blue, and also a substance used in alchemy, usually meaning cobalt oxide or cobalt arseniate. While zaffre itself does not have a story to go with it, alchemy definitely does. A while ago I did a storytelling program about alchemy for high school chemistry