Bengals star Joe Mixon went all out for his first playoff game ... ordering more than $400k worth of jewelry to commemorate the big day!!!
TMZ Sports is told ... the Pro Bowl running back wanted to do something extra special for his first postseason appearance, so he hit up his go-to guy Gabriel The Jeweler last week to whip something together.
We're told the order -- a special made Cuban link chain, iced-out Audemars Piguet, and diamond ring -- would usually take about a month to complete ... but Gabriel's team worked late for 8 straight days to come through for Mixon.
The finished product is incredible -- the chain has 170 carats of VVS diamonds (including emerald cuts), and the rose gold AP has 36 carats of diamonds with emerald cuts on the band.
And, check out how the diamonds dance on the ring!!!
We're told the order was finished early Saturday morning and was flown to Cincinnati just in time for the game. No word on how much Mixon shelled out for the bling, but we're told the 3 pieces are worth a total $400k!!
Gabriel tells us he'd do anything for his guy, Joe ... and he definitely proved that with the speedy delivery.
The Bengals will face off against the Las Vegas Raiders at 1:30 PM PT ... and as the saying goes -- you look good, you feel good, you play good -- so don't be surprised if Mixon has himself a game.