The new steeple on Gunnison Memorial Chapel is installed (remember when it arrived?) and beginning to react with the atmosphere around it. This chemistry, in which copper metal transfers electrons to non-metal atoms from the air to become an ion, is called “reduction-oxidation” chemistry—abbreviated “redox.” Seeing this reaction happen on such a large scale, and produce such an awesome array of colors, is a treat.
Decaseconds 
This is crazy cool and the photo is spectacular. The colors are unexpected.
Those colors really are the best. It’s one of the reasons I love inorganic chemistry: metals can make any color you can imagine.
I’ve been searching for reasons to love inorganic chemistry.
[…] in the evening, the lunar eclipse was in full swing and I shot it as it passed the newly restored steeple of the campus […]