Thief pockets diamond from Adelaide store

A brazen thief has pocketed a two carat diamond from an Adelaide jewellery store.

Police on Thursday released a security camera image of the suspect in the theft which occurred in March in the hope that someone may recognise him.

He entered the city store about 3pm and pocketed the 2.02 carat round brilliant diamond that had been on display.

Diamond prices can vary considerably, but the stone is thought to be worth between $15,000 and $60,000 depending on the cut, clarity and colour.