A nice slab of dinosaur bone from the Utah/Colorado Morrison Formationwhich dates to the late Jurassic sequence (155 million years ago - 148 million years ago) 2.54 ounces and approximately 3 inches x 2 inches and 6.5 mm in thicknessA variety of colors in this piece with a range in cell sizes from very tiny to quite large. Very prettyFrom a rock hounds 60 year collection of material Please check our other auctions for more dinosaur bone and petrified wood. Combi...ned shipping available for multiple purchases to save you money. Please wait for an invoice. Shipping charges will be calculated and available options offered on the invoice.