NFL's Kareem Jackson -- I Paid $15k ... To Immortalize My Favorite Cleats

NFL player Kareem Jackson spares no expense for his feelings ... 'cause the Houston Texans star paid over $15k for a tiny blinged-out replica of his favorite pair of cleats ... and they're pretty freakin' awesome.

We spoke with the guys down at AJ's Jewelers in Miami who tell us Jackson made a special request to transform his Nike Vapor Cleats into a miniature charm he could rock around his neck.

That's when they sprung into action ... taking over three weeks to create a VVS diamond-encrusted, 3D version of the shoes ... and when all was said and done, the pieces were worth more than $15k.

FYI -- AJ's has also created some pretty sweet stuff for other NFL stars ... including iced-out mini-jerseys for guys like T.Y. Hilton and Michael Huff.