TROY, Mich. -- Troy police said a man dashed out of the Neiman Marcus store at the Somerset Collection mall Tuesday with a diamond ring that is valued at $14,750.

Police said the man asked to see the ring, grabbed it and ran out.

Police said a witness followed the man outside and said he got into a dark gray Ford Taurus with tinted windows.

The man is described as black, about 18 years old, unshaven with braided shoulder-length hair, has almond-shaped eyes and curly lashes. He was wearing black-rimmed glasses with a black sweatshirt that had a white stripe down each sleeve. He was wearing a black baseball hat that had "Incredible" embroidered on the right side.

Anyone with information is asked to contact the Troy Police Department at 248-524-3477.