Josh Gordon is drippin' in confidence AND diamonds these days -- the Pats wide out just got himself a brand new swagged out "Flash" chain ... and we've got the pics.
Right before Gordon torched the Green Bay Packers for 130 yards and a touchdown, he got a brand new custom piece from Al the Jeweler from Labelle Jewelry in New Jersey.
It's sick as hell ... 600 VS quality diamonds weighing a total of 16 carats spelling out his nickname.
Yeah, no wonder he was extra swaggy on Sunday.
FYI -- Al is the guy behind Stefon Diggs' diamond Starbucks chain .