This goniotite is a good size with strong brown, black and cream markings. It is a very sculptural and decorative piece for any home office or den. Goniotites date from the Carboniferous and Devonian periods, some 360 million years ago. They had external shells which were divided into chambers which were filled with gas to give the creature buoyancy. These internal walls can still be seen on the polished goniotite as attractive irregular zigzag patterns.