Location Function Creator The Precursor Stone or Precursor egg is an important Precursor artifact in Jak II. The Precursor Stone is a bright green color, the Seal of Mar is carved on top. The Stone was hidden in the Tomb of Mar, but Baron Praxis managed to steal it using his Widow mech. It was held in place on a huge statue of Mar. With the discovery of the true form of Precursors and their deception in Jak 3, the true purpose of the Stone has become unclear. But it is possible that the stone really was an egg but hatched much later than the time at which Jak sees the hologram.