ByMary Whitfill Roeloffs,

Forbes Staff.

Social media star Jake Paul sported a one-of-a-kind $5.5 million Jacob & Co. watch studded with more than 700 emeralds while promoting his upcoming Netflix fight against boxer Gervonta Davis, while Mark Zuckerberg was recently seen at a UFC event wearing a specialized watch that may have carried a seven-figure price tag.

At a Sept. 23 press conference in Miami, Paul wore the Jacob & Co. Billionaire III, which is made of 18K white gold and contains 714 natural emeralds across the case, inner ring, movement bridges and bracelet, with a total carat weight of 147.65.

The following weekend, billionaire Zuckerberg rocked his own mega-luxurious piece at the UFC 320 event in Las Vegas: an Astronomic Souveraine from watchmaker F.P. Journe.