A nice slab of agatized dinosaur bone from the Utah/Colorado Morrison Formationwhich dates to the late Jurassic sequence (155 million years ago - 148 million years ago) 1.62 ounces and approximately 3 1/8 inches wide x 1 1/2 inches high and between 5.5 & 6 mm in thicknessNice small bluish cells with a splash of light blue in the center. Good darker blackish brown structure Photographed wet in daylight to show color and also dry to eas...ier see any fractures or voids From a rock hounds 60 year collection of material Please check our other auctions for more dinosaur bone and petrified wood. Combined 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.