Stone of the Pharaohs by Mephisto Huis Belgium

Great effect from Mephisto Huis of Belgium.  The spectator chooses a color mummy and places it in the sarcophagus and puts the lid on. The magician is tasked with determining the selected color.

He lifts a small box near the sarcophagus and exposes a beautiful crystal.  They crystal begins to glow.  A small amount at first but progresses into a brightly lit crystal that is the color of the selected mummy!

This is n excellent condition,  If you know anything about this you know it was issued originally with a battery that is no longer made. I sent it to a  electrical engineer who changed it over to normal readily available batteries so it is ready to go.