Talk about some dirty diamonds.

A descendant of the Cartier jewelry dynasty was sentenced to eight years in federal prison after confessing to running an unlicensed cryptocurrency exchange that laundered more than $470 million in drug trafficking proceeds.

Maximilien de Hoop Cartier, a resident of France who moonlights as a singer under the name “Max Cartier,” was sentenced in Manhattan federal court Tuesday after pleading guilty in October to operating an unlicensed money-transmitting business and conspiracy to commit bank fraud.

Maximilien de Hoop Cartier was sentenced to 8 years in prison for laundering $470M via an illegal crypto exchange.…