Willie Smith, Brian Sheed and Amin Shabazz, all 21 years of age, are accused of robbing the Ultra Diamonds jewelry store at the Philadelphia Premium Outlets in Pottstown, Pennsylvania, on November 3rd.
If convicted, Smith, Sheed, and Shabazz each face a maximum sentence of 20 years in prison and a $250,000 fine.
Smith is already charged in a New Jersey robbery.
He is accused of stealing $150,000 in Breitling watches from the Jay Roberts store in Marlton.
Investigators are checking possible links to other smash-and-grabs in the tri-state area.