Polished Septarian slices
Gorgeous polished Septarian slices, coloured with orange and brown Calcite. These pieces are occasionally included with fossils, too.
Septarian nodules are a rock formation with a void inside, which then gets filled with Calcite.
These slices are highly polished on one side, and left rough on the other. They make a great display object but could be cut into cabochons if you decided.