A necklace of seven graduated Madagascan large brown iridescent Ammonite Fossils with Black Onyx round spacers. At each end of the necklace is a row of five Black Onyx round beads. The Madagascan Ammonite Fossils are from the Jurassic Period and are 180,000,000 years old, (give or take a few months!). The largest Ammonite Fossil is 1.4 inches in width, 0.5 inches in depth, and 1.7 inches in length. The smallest Fossil is 1.2 inches in width, 0.2 inches in depth, and 1.4 inches in length. The necklace is 19 inches in length, and is finished with a black cotton macrame loop, and a Black Onyx round toggle.