The Weeknd got a pretty awesome piece of jewelry this week -- a sick diamond Super Bowl ring commemorating that epic halftime show in Tampa!

No, it's not an "official" ring like the ones the Tampa Bay Bucs will get -- this is a one-of-a-kind piece designed by celebrity jeweler, Elliot Eliantte, who's worked with some of the biggest names in Hollywood.

We're told the ring was commissioned by Cash -- who's the co-founder of The Weeknd's record label, XO -- hence the big XO design across the top.

The ring contains 16 carats of VVS diamonds -- with the words "World Champions" surrounding the Lombardi Trophy.

The ring also contains The Weeknd's name, the score of the game, the date and the Pepsi logo -- since they sponsored the halftime show.

And, to make it even more special, we're told Cash gifted the ring to the singer on his birthday -- Feb. 16.