Crews on Sunday were attempting remove three Boeing 737 fuselages that tumbled down a steep bank and into the Clark Fork River in western Montana after a train derailed.
The Robinson Bar Ranch compound includes a 7,300-square-foot lodge, a private residence, a caretaker's home, a professional recording studio, guest cabins and horse barns.
The fragment is two by 2.8 centimetres in size and one centimetre thick. According to Mazar, it appears to have been part of a tablet which contained a diplomatic message exchanged between kings in Jerusalem and Egypt.