Another day, another super expensive purchase for Floyd Mayweather ... this time, the boxer dropped $250k on two diamond and gold chains -- and offered to pay IN CASH!!!
The boxing legend hit up Mr. Flawless in NYC -- where he had his eye on two diamond cuban link chains.
We're told one chain weighed in at 2.2 pounds ... with 60 carats of diamonds. The other weighs 2.65 pounds and sports 70 carats in diamonds.
When it came time to pay, Floyd whipped out a giant stack of cash ... but we're told he was just playin' around -- and did what everyone else does at a jewelry store ... charged it.