Sheriff's Investigator Aaron Hannsz said Wednesday police are in the early part of the investigation and had few details.
But according to a Richmond County Sheriff's Office report, the man asked a clerk at Kay Jewelers to show him the "most expensive ring in the store." When the clerk placed it on the counter, the man snatched the ring and ran toward Macy's, the report said.
Witnesses saw him getting into a red SUV and driving toward Wrightsboro Road. He is described as a black man in his early 20s, about 6-feet tall and weighing 130 pounds.
He told the clerk that he worked for Foot Locker in the mall, and was wearing what appeared to be that store's uniform at the time of the theft.
A manager at the store said Wednesday he could not comment on the theft and referred inquiries to Kay's corporate communications department.
A message left with its media representative was not returned late Wednesday.