Natural Ammonite Shell Fossils Specimen 2 Piece Cut Halves (7) An ammonite shell fossil, cut in half, reveals intricate chambers in a spiraled pattern. These marine mollusks lived over 65 million years ago, and their shells filled with sediment, which mineralized over time, preserving their stunning, geometric beauty. Approximate Measurements 21.40 grams for 2 1.33-1.30" x 1.0" - 1.09" x 0.26-0.32" Please note natural fossils are one of a kind and tend to have imperfections. Certian lighting may alter the crystal's color display in photos. Smoke Free | Pet Free Environment #Fossil #Ammonite #Specimen #Mollusk