Dez Bryant: Drops $200k On Iced Out Jewelry ... 215 Carats!!

It's 59 degrees in Big D, but the forecast calls for ICE -- 215 CARATS worth -- around Dez Bryant's neck ... 'cause the Cowboys superstar ordered $200k worth of RIDICULOUS jewelry.

Bryant hit up Johnny's Custom Jewelry in Houston ... and commissioned a Cuban Link chain and bracelet ... as well as 5 "X" pendants for signature celebration move.

King Johnny -- the shop's owner -- tells TMZ Sports Dez wanted something unique ... so he designed and fabricated each piece, diamond by diamond ... which took 2 months.

The breakdown: 175 carats for bracelet & chain, and 40 carats for the pendants.

#ItsGoodToBeRich