CIDG produce its granite from Aswan Quarries(Assuan)and other quarries where ancient Egyptians built the pyramids The granite for the pyramids probably came from the northern part. For the construction of the pyramids, the ancient Egyptians only used building stones in perfect condition and that is only a stone which has been split off. Some archeologists assert, that also weathered roundish granite boulders were used, this kind of stone always has small fissures and can break apart easily, so it is unsuitable for use as a building stone