November 15, 2019Day 82 Scroll down to content Day 82 of the 365 to 40 project. Despite looking like a giant splotch of mold I’m reasonably certain it’s some reasonably advanced copper corrosion in a little sample ore rock I have. Share this: Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on Pinterest (Opens in new window) Pinterest Published by dawnstarau View all posts by dawnstarau