A living ammonite was kind of like an octopus with a shell. Today they are represented only by fossils.
Sometimes ammonites are split open and the inner surfaces are polished to reveal the chambers inside. Usually both halves are sold
as a unit and it makes an educational and very attractive display.
This ammonite is quite a bit larger than the whole specimen which was part of an
$8 fossil kit.
Though the most familiar ammonites are the flat spiral type, similar to a ram's horn that gave them their name, there are several
other kinds as well.
Some had shells that were nearly straight, others were straight and then coiled then straight again. Some had a helical spiral like
a snail, but the strangest shells were those of