The theft occurred on Sunday November 30, 2008 at the Milanj Jewelry Store inside the King of Prussia Plaza.
Robinson allegedly fled the store with a $300,000.00 ring he was being shown at the time.
Authorities are continuing their search for Robinson. Robinson's last known address was 550 N. 58th Street in Philadelphia.
If you have any information about his whereabouts you are urged to contact Upper Merion police.