This is a limestone fossil concretion that contains many embedded fossil shells and echinoids (sand dollars) from the Pliocene and Miocene periods (approx. 5-23 million years ago). This specimen was found in the Peace River, Bone Valley Formation of Florida.
Refer to the photo. The black centimeter cube is shown for scale and is not included. You are purchasing the specimen shown. It weighs approx. 119 grams and measures approx. 4 x 2 inches at it's widest point. Your purchase will include an ID label.