Ok, here's my ante for this post.

I found this duringy field camp in Northern New Mexico. It was in a tailings pile outside the Champion mine. Prospectors hoped to mine copper, but there was never a big enough deposit found to warrant opening a full mine.

I'm pretty sure I know what it is, but I want to see if you can guess it. The rock is massive, no discernable grain boundaries. It can scratch your hammer. It does not react to HCL. The colorful part appears teal (not turqouise). It was formed in an area known for regional metamorphism. High grade schist and folded terrain are common. What could it be?