How an F1 team lost a $300K diamond at the 2004 Monaco Grand Prix

It’s a scene that feels plucked straight from a Hollywood heist movie — only art imitated life a little too closely. In May 2004, Formula 1 descended on the principality of Monaco for its annual display of speed, opulence and wealth, but one glittering object stood out above all else: a $300,000 diamond on the nose cone of Jaguar’s car. What could go wrong? 

The massive rock - which disappeared during the Grand Prix - was part of an outlandish marketing stunt that resulted in one of the sport’s most bizarre unsolved mysteries. At the time, Jaguar Racing - which was owned by Ford - was underperforming, and desperately clinging to anything that would help them maintain relevance. 

With the George Clooney-led Ocean’s Twelve movie about to hit cinemas, a group of marketing execs from Jaguar, and the film’s production company Warner Brothers, came up with an idea. They decided to lean into the movie’s premise of stealing jewels (though the film was about the theft of a Faberge Egg) by placing two massive diamonds - that were uninsured - on the front of Jaguar’s cars. 

Promoting the film Oceans Twelve with the Jaguar team: George Clooney, Actor; Christian Klien, Jaguar; Brad Pitt, Actor; Mark Webber, Jaguar

Photo by: Sutton Images

They partnered with diamond trader Steinmetz, who provided two 1.4-carat white diamonds for Mark Webber and rookie Christian Klien's cars, valued at around $300,000 each. When adjusted for inflation, that’s more than $1M worth of jewels. Even Clooney, Brad Pitt and Matt Damon were on-hand to help promote the stunt. But there was one problem: it seems nobody had considered what would happen if they crashed. 

The 2004 Monaco Grand Prix was only Klien’s sixth F1 race. An uninsured diamond placed on one of the most fragile parts of an F1 car, being driven by a rookie around a street track that’s known for claiming front ends. You simply can’t make this up! 

Jaguar Racing and Steinmetz present the Diamond Jaguar R5: the Diamond Jaguar R5 complete with a diamond set in the nose to promote the film Oceans 12

Photo by: Jaguar Cars and Wieck Media Services, Inc.

On the first lap, Klien hit a barrier at Loews hairpin and lightly damaged the front end of his car. He emerged from the crash unscathed and retired from the race, but the diamond was gone, never to be seen again. The team’s spokesman, Nav Sidhu, who was heavily involved in the ‘Ocean’s Twelve’ sponsorship later said, "At that point, I probably should've been worried about the car or the driver. But, I must admit, my immediate thought was for the diamond."

But there was no trace of the prized jewel when the car was returned to the garage after the race two hours later, and rumors quickly began swirling. Without footage of the crash, multiple theories started to take hold. Some wondered whether the diamond had become lodged in the barrier, or swept up with other debris and washed out to sea through a storm drain. 

Christian Klien, Jaguar R5

Photo by: Steve Etherington / Motorsport Images

Others have suggested the diamond flew off before the impact of the crash (after all, it was reportedly only stuck on the car with glue) and was pocketed by an opportunistic spectator or marshal. Others even theorized that the real diamond was never on the car, and Jaguar switched it out for a replica at the last minute, though Sidhu vehemently denied that theory. 

All’s well that ends well, however, as Jaguar got exactly what it wanted from the stunt: publicity. The story made international news for weeks afterward, and though 2004 marked Jaguar’s last year in F1, the team was purchased by Red Bull, who would go on to become one of the sport’s winningest teams. 

More than two decades on, the sheer lunacy of the diamond’s disappearance continues to capture the imagination of F1 fans. It’s almost unthinkable that a room of executives would approve a six-figure gemstone being stuck on the nose of a car driving around the notoriously tight streets of Monaco. If the jewel was picked up by a lucky onlooker, they hold a glittering piece of F1 history from one of the sport’s most expensive DNFs of all-time.