Ammonites existed some 330 million years ago. It is a very delicate and shy sea animal. After its years of being buried a hard ammonite shell is formed. Today they are extinct and rare fossils. The thinnest chip of this fossil was taken to make the most unique time piece of the world. This sea stone just slips the natures beauty of underwater life on to your wrist Made in 18k gold with 2.206 ct of diamonds, Swiss ETA movement and genuine leather strap.