It was a gift given to me from a gentleman I took care of in his last months of life. He was a wealthy and educated man so I trust when he said, "that is a valuable piece". Sadly he passed shortly after leaving me with no further details of this fossil. It is approved. 10lbs, I sent photos to 2 University paleontologist and never was able to get to definitive answer to what it is. It is in great condition.

10lbs, 24inx5.5inx8 outer. Inner measures 3.5inx4.5inx5in