One of a kind 37.50ct split Ammonite Fossil

Dating back to the Cretaceous era, this split ammonite boasts a remarkable age of approximately 100 million years! Its outer shell is embellished with ancient iridescent opal, displaying mesmerizing flashes of rainbow hues. Within its divided interior lies a striking Fibonacci swirl, further enhancing its appeal. Measuring approximately 22.7mm x 19mm x 6.4mm, this split specimen was sourced from Madagascar.