Vikings' Justin Jefferson Cops Insane Diamond Jet Pendant Amid Breakout Season

How's Justin Jefferson rewarding himself for ballin' the hell out during his rookie season?!

BLING, BABY!!!

TMZ Sports has learned the Minnesota Vikings star receiver just copped a new diamond chain featuring a jet pendant ... and it's AWESOME!!!

We're told the wideout hit up Leo Frost in Houston a few weeks ago to get the ice made ... and the famed jeweler sure as hell delivered.

The jet -- an obvious nod to Justin's "Jet" nickname -- is iced out ... while the chain features stars on the links.

All told, the piece is 14k gold with 37 carats of VVS diamonds!!

No word on what JJ paid for the drip ... but don't worry -- dude can afford it, he signed a 4-year, $13 MILLION deal this year!!