A routine jewelry shopping spree turned into high drama for Floyd Mayweather on Thursday -- when things got heated with a store owner over a $1 million stone and cops were called, TMZ Sports has learned.
We're told Floyd was shopping at the Diamond Club fine jewelry shop inside the Seybold Building when Mayweather zeroed in a stone.
Our sources tell us ... a verbal altercation broke out between Mayweather and the shop owner -- and things got so intense, someone inside the shop called police.
By the time cops arrived, we're told Mayweather had already left the shop.