Substantial Split Agatized Ammonite Pair

This Substantial 9.1-inch diameter Split Agatized Ammonite Pair, weighing a combined 5.97 pounds, showcases the intricate process of agatization, where silica-rich agate filled the fossil's internal chambers. Carefully cut and polished, it reveals detailed whorls, septa, and mineral-filled chambers, offering a rare glimpse into the structure of this ancient marine creature with both scientific and aesthetic appeal.