The Moonstone is in Vince's backpack. Use your cell phone and dial 555-6789. When he is distracted, take the Moonstone from the bag. (see related question)
The Sphinx is at Giza on Nabooti Island (Egypt is in north Africa). The blue jewel is in the tomb beneath the Sphinx.
The tomb is inside the Sphinx at Giza, on Nabooti Island. (see related question)
On Nabooti Island, the Blue Jewel is in the Mummy Room of the Sphinx at Giza.
The Moonstone will open the Sphinx. Climb to the top of the Sphinx and put the stone in the ring there.
There are no keys on Nabooti Island. The Sphinx at Giza is opened by the Moonstone that Vince and the tomb robbers have found. It is placed in the ring atop the Sphinx. (see related question)
The blue jewel for Nabooti is in the tomb inside the Sphinx at Giza. (see related question for solution)
Vince is Vince Graves, fortune hunter and tomb robber. He is looting the tomb of the Sphinx at Giza on Nabooti Island. He has the Moonstone in his bag, and if you get it, you can open the Sphinx. (see related question)
The blue JEWEL, one of the five missing JEWELS on Nabooti Island, is located inside the tomb in the Sphinx at Giza. (see related question)
First that question is not a question. After he hands you the shovel you call the dude. Get thing out of the bag put at the top of the Sphinx.
Use the Moonstone to enter the Sphinx, and solve the three challenges there. The Blue Jewel is in the Sphinx.(see the related question)
The blue JEWEL, one of the five missing Nabooti JEWELS, is located inside the tomb in the Sphinx at Giza. (see related question)
The mummy case is part of the last challenge in the Sphinx at Giza. There are four challenges in all. (To defeat the sphinx, see the related question.)