A supposed customer bolted with a $20,000 diamond from a jewelry store in the Cherry Creek Shopping Center Tuesday afternoon, Denver police said today.

The man asked to see a loose marquis-cut diamond at about 4:30 p.m., then ran from the mall to a black Chevrolet Monte Carlo.

The Colorado license plate, 002LAT, is registered to an address in Pueblo, but no one matching the description of the thief has been found, Denver police said.

He is described as Latino with brown hair and brown eyes, 22 to 29 years old, 5 feet, 10 inches tall and about 180 pounds with a stocky build.

Anyone with information can call police at 720-913-2000 or Crime Stoppers at 720-913-7867. Tips also can be submitted by texting CRIMES (274637) with the title DMCS, or by e-mail to metro-denvercrimestoppers.com.

There is a $2,000 reward.