Marble below, schist above; the Appalachian mountains in miniature…
A beautiful specimen – Wish I knew more about it. Bill Burton gave it to Alan Pitts to give to me. I don’t think any of us know where it came from, beyond “the leftovers pile in the saw room at USGS headquarters”… I’ve put in some elbow grease lately polishing it up. Hopefully soon I can share a macro GigaPan of it with you. For now, this will have to do…