Bonaparte was senior vice president of JCK Brands for Reed Exhibitions, a promotion that was granted a year ago.

FORBES: Jewelers of America Names JCK Veteran For Top Spot

The 46-year-old skipper of the JCK is believed to have drowned after his 19ft (5.8m) boat was swamped in stormy conditions on Monday night.

BBC: Torquay JCK skipper lost at sea named as Andrew Westaway

During the recently concluded Luxury at JCK jewelry trade show in Las Vegas, the siblings introduced updates and new items for its high-end, bridal and fashion lines.

FORBES: Royal Asscher Honors its Heritage with Glittering New Jewelry Designs

His responsibilities also included leading jewelry trade publication, JCK magazine.

FORBES: Jewelers of America Names JCK Veteran For Top Spot

He has spent at least 16 years managing the JCK Las Vegas show and all of its affiliate tradeshows (such as Luxury at JCK and Swiss Watch at JCK) that were added over the years.

FORBES: Jewelers of America Names JCK Veteran For Top Spot