The plan was crude, and in terms of immediate success, effective. But the "brazen" bloke who snatched a five-carat diamond worth more than A$300,000 from a Sydney jewellery shop maybe didn't quite think the whole plan through.
He's being urged to hand himself in, with police revealing he's been snapped in living colour in CCTV footage - and they've circulated it far and wide.
The man visited the flagship Cerrone Jewellers store at Martin Place on Monday, before returning on Tuesday and asking to see the stone.
It's thought he used Monday's visit to study the stone and have a copy made.
After asking to see the stone on Tuesday, he then switched the uncut diamond with a replica of lesser value while the employee's back was turned, then left the luxury store.