Kayvon Thibodeaux Wore 40Ct Diamond Pendant Reppin' Foundation At Draft

Future NY Giants star Kayvon Thibodeaux was shinin' brighter than the Las Vegas lights -- with this insane 40-carat diamond pendant the DE rocked while being drafted 5th overall by the G-Men.

Jeweler Saki Diamonds tells TMZ Sports he made KT the iced out chain to honor his "Jream" (pronounced dream) foundation ... where Kayvon helps underprivileged kids.

"It meant a lot to me," Saki, a former football coach (before he switch professions), told us.

The pendant looks just like the Jream logo ... with a little boy reaching for the stars in the cloudy sky. It's filled with 40 carats of canary yellow, black and white VVS diamonds.

And, if the piece wasn't cool enough ... the chain and pendant are both reversible!

"He can have 4 different looks in one chain and pendant," Saki said.

Saki says it also glows in the dark ... "when the lights go off on the pendant, you still see the clouds and the stars."

The Jacksonville jeweler says the 1st round pick came up with the idea and it took two weeks to get the piece ready for his big night.

Kayvon wasn't the only athlete wearing Saki's work at the draft ... former Georgia Bulldog Nakobe Dean copped an iced-out rose gold Cuban link chain and a two-tone Cuban bracelet.

Garrett Wilson -- who went 10th overall to the NY Jets -- was also seen rockin' a Saltwater Akoya pearl necklace and Cartier shades.

Saki -- whose client list ranges from NFL's Marlon Mack to Za'Darius Smith -- says it's an honor they chose him to put something together for a life-changing moment.