Thunder eggs are usually just cut in half and then both halves are polished and enjoyed. There are times when slices are better. One might be when you have a relative half-way across the USA and you want to ship them a sample. It would be less expensive to just ship a slice rather that the whole half. Collectors with limited space can display several slices where one half might sit.
These slices are cut from an Oregon Thunder Egg. They are polished on the front side only. Those east of the Mississippi River might want to order one of these just to see what people in Oregon get so excited about. God made enough of these that we can share. Larry