The man who became history wearing pearls
Throughout European history, pearls have always been loved by kings and royal nobles. , he and pearls became one from an early age. The luxurious string of pearls he wears in portraits has become a classic, and he even wore earrings on the battlefield, and it was not until after his execution that the earrings were removed and given to his daughter when his body was prepared for burial. 
Charles I, portrait at the age of 15
In an era when pearls were extremely valuable, his earrings were surprisingly large, measuring 58 inches, and were a rare pear shape. On top of them was a golden crown, a sphere, and a cross.
The earrings are now in the collection of The Portland Collection Museum - Harley Gallery. 
In the 16th and 17th centuries, earrings became popular among some wealthy English men, a trend that had been imported from France. But those few men who wore earrings certainly weren’t the majority. After a nearly 600-year hiatus, earrings made a comeback in England in the 16th century—driven largely by women.
Although women have been more fond of wearing pearl jewelry than men for a long time, pearls were originally worn by men.
Another was Justinian I, Byzantium's greatest ruler, a prolific builder and patron of learning, art, and literature. 
In addition to the celebrities' looks, in recent years, jewelry fashion has focused on pearls as the key accessories for men, which can highlight their unique style in their outfits.
PEARL NOIR Men's Pearl Jewelry Collection - Stylish pearl jewelry for men｜Matsuru Fukui
Made of natural unique 16x10mm Baroque black pearls with a dark layered leather strap
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History Source:
https://www.atlasobscura.com/articles/king-charles-i-pearl-earring-execution.amp
https://internetstones.com/history-of-the-discovery-and-appreciation-of-pearls-the-organic-gem-perfected-by-nature-page-6/
[Images from internet]