This is on the 3rd exchange. I received two rocks from BigDlittled. One is a very angular piece of light brown shale. The layering is visible along one edge, and one side (not visible in the pic) is stained or oxidized to a dark brown. It looks like a piece from one of those old wooden jigsaw puzzles for kids.

The other piece is very interesting. It’s hard ro see well from the picture, but it’s a very light green color. The dark circle was filled with sediment, and when I washed it out well all of that dark sediment came out and left sort of a half-sphere cavity. The rock itself is crystaline with a very distinct radiating pattern on the fractures. It looks familiar, but I can’t think of what it is. I’ll have to check further into it.

Thanks Dd! I’ll try to get yours sent out before vacation.

I now have one completed exchange, one that I’ve received but haven’t sent yet, and one that I’ve sent but haven’t received (but I will pick up in just 11 days! :) ).