Robert Kraft is offering up one his most prized possessions to help raise money for COVID-19 relief ... putting his 283-diamond, Super Bowl LI championship ring on the auction block!!
The New England Patriots owner made the announcement Sunday ... accepting Michael Rubin's "All-In Challenge" with one of the most enticing packages we've seen yet.
The bling is one of the biggest championship rings ever created ... weighing 5.1 carats and featuring 10-karat white gold and nearly 300 diamonds.
Of course, the jewelry has a very special meaning as well .