Beautiful Jurassic age agatized dinosaur bone from the Morrisson Formation in southern Utah. It dates back 150 million years ago to the Jurassic time period. I acquired this piece from a friend who attended the Ernst Shirley estate auction. He owned a rockshop in Hanksville, Utah and was a prominent collector of dinosaur fossils. 

The photos are shown wet and dry.

There are a ruler and scale in the photos for size reference and weight.