Time Walker [1982 - USA] sci fi

In California, a university acquires a sealed sarcophagus found in the tomb of Egyptian Pharaoh Tutankamon. The mummy is under the responsibility of Prof. Doug McCadden, and will be presented to the public in a big opening party in the campus. After many x-rays of the coffin and the mummy for study, the operator Pete Sharpe finds five hidden jewels in a compartment in the bottom of the coffin. He hides the finding and steals the jewels, selling and giving them to other persons in the campus, including his girlfriend. Meanwhile, the x-rays revive the mummy and it vanishes, looking for the five jewels and leaving a weird green substance in the empty casket. A student touches it and the fungus eats his arm. A further investigation reveals that the fungus is activated by x-rays and eats human flesh. When the news about the disappearance of the mummy is disclosed, the students decide to have a thematic party about Egypt, including costumes of mummies. Meanwhile, Prof. McCadden realizes that the mummy is indeed an extraterrestrial being and the jewels are crystals for a communicating apparatus.