NOTE: This w/u appeared on the De Beers node and I realized that it probably didn't belong there and have since moved it here. Please forgive any confusion.
While I feel that De Beers, the company, is utterly ruthless and heartless in its business dealings and practices, I have to give 'em props for using the music they do in their American commercials.
The piece that we Americans are familiar with (I don't know about commercials in other countries) is called "Palladio 1 - Allegretto." It's honestly a fantastic compilation of music. I wholeheartedly suggest the third movement "Palladio 3 - Vivace" as it is absolutely stunning in its precision.