US$30.00 This gorgeous sectarian sphere carved from a nodule found in Madagascar. Septarian nodules were formed as clay balls on the ocean floor during the Cretaceous period - 70 million years old. Over time, the balls cracked and were filled with minerals. The brown lines are aragonite, the yellow ones are calcite, and the grey rock is limestone.A beautiful decorator item!This are representative items, please note that every tooth is slightly different, as they are unique fossils.