Ancient summerian, the ancient history museum in Cairo was looted, and this very well may be a piece from it. If this is the real thing its worth hundreds of thousands. I'd deleted the picture if I were you, and have an admin lock the thread, this most likely is stolen property.
Hold onto it and don't tell anyone you have it either, save it for your son or his grandson and he will be able to sell it without an repercussions and he will be a rich man.
Look at the pictures carefully, he took pictures of a computer screen, doubt he actually has the darn thing...
It's called Cuneiform, one of the earliest written languages. Cuneiform - Wikipedia, the free encyclopedia