This brooch/pendant, designed by Carolyn Tyler, features a piece of ammolite shell from Calgary, Alberta, Canada. Ammonites are an extinct group of marine animals related to modern-day Cephalopods, such as the squid, octopus and nautilus. They lived 200 – 65 million years ago and became extinct at about the same time as dinosaurs. Some ammonite fossils show iridescence when the shell is polished. This iridescent shell, called ammolite in the gem trade, is used in jewellery. This piece also features garnet and tourmaline and is made with 22K gold.