Handmade Ammonite Fossil Necklace With Carnelian, Tiger Eye, Petrified Wood, Wooden Beads, Vintage Wooden Beads, And Vintage Coral (*I Usually Stay Away From Coral, As I Feel It's Obtained Unethically, But This Is From The 1970s). Ammonites Were Marine Creatures Similar To The Nautilus That Lived During The Jurassic And Cretaceous Periods. I Make These To Be Swimmable; However, Wooden Beads May Fade Over Time.