This thin section was one of a hoard that was deaccessioned by Arizona State University in 2014. My notes from then say “Very large sample. Interesting and busy TS. (Is TS curved/cupped?)” This week I looked closer and found that the glass cover slip is partially detached from the base glass slide, lifting up – and has brought the stone sample up with it! It is still busy and interesting. Here are some photos, maybe the last ever from this slide, all photos after the first two are in cross polarized light.