See here: (
http://sportsillustrated.cnn.com/2004/writers/pete_mcentegart/05/28/column.diamond/)
<snip>
The concept was straightforward enough. In part to help promote the upcoming George Clooney-Brad Pitt film Ocean's Twelve, Jaguar's two Formula One cars at Monaco each had a diamond mounted on their "nose cones," the very front of the aerodynamic rocket-like cars.
The catch is, of course, that sometimes race cars don't stay in one piece. And when 20-year-old driver Christian Klien plowed into the metal barriers nose-first after a hairpin turn in the course that winds through the glitzy Monaco streets, the diamond went flying.
The gem still hasn't been recovered. Or, more accurately, nobody has stepped forward to return a diamond worth in excess of $200,000. It's not exactly the sort of thing that most fans would drop by the lost-and-found.
</snip>
It's quite funny actually. At least one person in Monaco is a real fan of Jaguar team right now.