This is a wonderful Goniatite fossil. It has been polished.
It is 2 and 1/4" long and 1 and 3/4" wide. The colors are vivid and crisp.
What a charming piece to add to your collection.
Goniatite lived during the Carboniferous Period, around 300 million years ago. A single relative survives today, the pearly nautilus of the south Pacific.
Goniatites probably had heads with well developed eyes, as well as grasping tentacles. They swam by squirting water out of their body cavity.