Publicity stunts can go to great lengths to ensure they create a hype that everybody is talking about, even if it means sticking a $300,000 diamond (around $530,000 today if you account for inflation) on an F1 car, which then crashed into a wall on Lap 1 during the 2004 Monaco GP.
Reports of the incident surfaced on social media as F1 races in Monaco this weekend, marking the sport’s sixth round of the 2026 season. Some stories never fade and are relived every year, especially if they remain an unsolved mystery.
Actually, two F1 cars belonging to the Jaguar Racing F1 team, which was owned by Ford back then, were each fitted with the 1.4-carat white diamonds that had no protective coating or insurance. Only some glue between the diamonds and the nose of the F1 cars held them together.
The idea of sticking two expensive diamonds on F1 cars during a live race was a result of a meeting between marketing executives of Jaguar Racing and the production company behind Ocean’s Twelve, starring George Clooney, Warner Bros.
A Win-Win for Ocean’s Twelve and Jaguar Racing
According to a report by Motorsport.com, the production company wanted a solid platform to market the movie, which also featured Brad Pitt, and they thought, what better place than the Monaco GP, a race weekend filled with glitz and glamor across the principality of Monaco?
On the other hand, Jaguar Racing was one team that was struggling, so it had to do something big to remain relevant in the sport. Consequently, they planned to do something related to the theme of the movie, of stealing jewels, even though the movie was about the theft of a Faberge Egg.
This marketing stunt would reportedly benefit the movie with publicity and help Jaguar Racing with its marketing. Thus, a partnership with diamond trader Steinmetz came about, who supplied the two white diamonds to be fitted onto the Jaguar Racing F1 cars that were going to be driven by Mark Webber and rookie driver Christian Klien.
On race day, even Clooney and Pitt were in Monaco to promote their movie, while the noses of both the R5 F1 cars sparkled due to the diamonds. However, nobody had thought of a backup plan to save the diamonds in case one of the cars, or both, crashed.
Well, that is what happened. Klien, who was racing in his sixth F1 race in his debut season, crashed his car on the opening lap, bringing his team and people in the production company to the edge of their seats as they watched the incident unfold.
Klien went straight into a barrier at Loews hairpin and damaged the front end of his car. Although the damage was not severe, it ended his race. But what about the diamond?
Where Did the Diamond Go?
Well, the whereabouts of the diamond remain the biggest jewel mystery to date in F1 because nobody knows what happened to it during the crash. Two hours later, after the race had ended, the car was returned to the Jaguar Racing garage, but it came in without the diamond.
Several theories hint at various possibilities, but there is no concrete proof to arrive at a conclusion as to what happened to the diamond. Jaguar Racing’s spokesperson, Nav Sidhu, who was linked to the promotion of Ocean’s Twelve, said after the race:
“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.”
Without the footage of the crash, speculation suggested that the diamond may have gotten stuck in the barrier, or it may have made its way into a storm drain with other debris and ended up in the sea.
Some rumors suggest the diamond got dislodged due to the impact of the crash and came into the hands of a spectator or a marshal. A conspiracy theory floated around, accusing the F1 team of swapping the real diamond with a fake one before the car left the garage, but that has been strongly denied by Sidhu.
Despite the loss of a precious stone that would have cost upwards of $500,000 today, the diamond did its job of promoting the movie, as news of its disappearance made headlines for quite some time. That raises further speculation about whether the crash was an actual accident or a deliberate one. Nobody knows except those who saw the diamond after the crash.