Stuck on the Jewellery store mission already! - posted in GTA V: Im doing it smart. But as soon as ive finished casing the jewellery store and. The Jewel Store Job is the first Heist mission in IGN's Grand Theft Auto 5 Walkthrough. This guide will highlight the main mission strategies and. Casing the Jewel Store is a mission in Grand Theft Auto V, given to Michael De Santa by Lester.