Aaron Gordon is a helluva basketball player and apparently one whale of a teammate too ... 'cause TMZ Sports has learned the Nuggets star gifted Jamal Murray a sick diamond pendant before the start of this week's NBA Finals.
We're told AG was so thrilled over the way Murray's helped lead Denver this season ... he hit up Mile High Jewelers to make a custom piece to show his appreciation.
Gordon wanted the new bling to represent Murray's signature on-court celebration ... and the jeweler certainly delivered.