The robbery happened at the Zales Store at the Exton Square Mall on Friday, December 27th just after 4:00 p.m.
Police say the four African American men entered the jewelry store and immediately separated creating a distraction.
The suspects spoke to different employees and asked to look at jewelry, but none of them made a purchase.
Employees discovered two diamond rings missing from a display cabinet shortly after the men left the store. The rings were valued at approximately $15,000.
The first suspect is described as an African American man with a dark complexion, between 35 to 45-years-old, 6'2" with a thin build and salt and pepper hair.
The second suspect has been identified as 57-year-old Kevin Blagmon from the 2000 block of North Stillman Street in Philadelphia.
Police have issued a warrant for Blagmon's arrest on several felony charges including retail theft and other related offenses. Investigators have been unable to locate him.
The third suspect is described as an African American man in his 60's, 5'6" tall with an average build, and salt and pepper hair. He was missing a few front teeth and carried a cigar. Witnesses say he wore a distinctive necklace with a handgun shaped charm which contained diamonds.
Investigators have not recovered the stolen rings. They are hoping the public can help identify the other persons involved in the theft.
Anyone with information is asked to contact the West Whiteland Township Police Department at 610-692-5100.