Translate the following English sentence to French:
"More than anything, however, an embargo should be imposed on diamonds smuggled illegally from the country, estimated at USD 60 million annually, which is what is at stake for the rebels in their warfare."
Mais il convient surtout de mettre en place un embargo sur les diamants qui sortent illégalement du pays par le biais de la contrebande - l'équivalent de 60 millions de dollars par an selon les estimations - et qui constituent, pour les rebelles, l'enjeu de la guerre.