Bling!

10:40 AM PT -- Cardi B actually broke the bad news to Offset. We're told he left the chain on the table Tuesday before flying back to Atlanta -- and later, Cardi called to tell him the jewelry was missing.

Offset's neck is a little lighter today, and he ain't happy about it -- someone jacked a $150,000 chain out of his NYC hotel room ... TMZ has learned.

According to law enforcement sources, the chain was stolen sometime Tuesday evening from Offset's room at a lower East side hotel. We're told the jewelry was last seen on a coffee table in the room.

It's unclear which piece the thieves made off with, but they had plenty of options after Monday's Met Gala, where the Migos rapper was dripping in multiple gold and diamond chains.

No arrests yet. We're told cops are checking surveillance cameras near the elevator banks to see if they can spot the grand larceny suspect.

Hard to tell what shines more ... Rich the Kid's Gucci shirt, his diamonds or his brand spankin' new Maybach!

We caught RTK stepping into his new whip Monday night outside Beauty & Essex in Hollywood. We tried to talk some biz -- he's reportedly signed actual kid rapper Lil Tay. But Rich was more interested in his fresh-off-the-lot car. He says just bought it the day before, and paid ALL CASH.

The luxury ride costs somewhere around $200k, so he's living up to his name.

He even got a driver for the ride -- makes sense at that price point -- but doesn't look like RTK's taking anyone along for a ride yet, which ain't surprising.

When you've just dropped hundreds of thousands of dollars at the Dubai Mall ... you don't have to WALK from store to store, you get DRIVEN -- just ask Floyd Mayweather.

The 41-year-old boxer and his massive entourage were spotted in a two-car caravan -- complete with chauffeurs -- being driven through the upscale mall with TMT bodyguards and a couple of bellhops in tow.

In fact, the bellhop carts were packed to the brim with shopping bags -- and knowing Floyd, the dude dropped a fortune.

Mayweather loves to vacation in Dubai and tends to spend a TON of money when he visits. Back in 2015, he dropped just over $1 MILLION on a diamond watch during a $1.5 million shopping spree.

So, yeah ... that's why he gets VIP treatment.

Lea Michele knows NOTHING sweetens up your cup of coffee like a massive diamond ring on the hand that's holding it.

The "Glee" grad was strolling around NYC Tuesday with her new treasure -- as in her fiance, Zandy Reich ... the guy who gave her the OTHER treasure.

We know you're wondering, so ... it's a 4-carat elongated radiant cut diamond. Lea and Zandy announced their engagement last weekend. They've been dating since last summer, when Zandy managed to bust out of the friendzone ... they were pals before the hookup.

The groom-to-be is president of the clothing company AYR -- and his bride-to-be is obviously very proud ... of his taste in jewelry.

The NFL prospects are stylin' it up on their way to the 2018 Draft ... and we're live streaming the whole thing.

The draft is always an opportunity for the fresh rookies to make a fashion statement -- for better or worse -- and this year's batch is living up to the hype.

Saquon Barkley's sharp outfit includes special messages representing his high school and Penn State. The stud running back also copped embroidered socks featuring the initials of his newborn daughter, and Nike made him a custom pair of Air Max sneakers with the same fabric used for his tux, according to stylist Tom Marchitelli from Gentleman's Playbook.

Jaire Alexander's killin' the kick game as well with leopard kicks ... along with a red suit designed by Boushra Alchabaoun from Elevee.

Boise State stud Leighton Vander Esch went all out with the bespoke plum suit designed by Sami Jenks of Elevee. Ex-UCLA star Kolton Miller also went with Jenks ... sporting a Super 150s Italian wool suit.

The draft is set to go down from AT&T Stadium at 5 PM PT ... so be sure to check out all the dope outfits before the Browns officially go on the clock.

1:29 PM PT -- Sources close to SJP tell us the actress was hit with several additional requests from the company after she'd already signed an original deal. We're told none of the new demands were in the first contract.

Our sources say the new requests included -- 50 Instagram posts a year, bring Kat Florence to 4 events per year, wear the jewelry to 24 events per year PLUS at all award shows, wear one piece to all magazine shoots AND do 12 International magazine interviews per year discussing the jewelry.

A rep for SJP tells us, "Kat Florence reneged on their contract with SJP. They have refused to compensate her after fulfilling her contractual obligations and continue to use her image for advertising and publicity to promote their brand."

Sarah Jessica Parker made a multi-million dollar deal to launch a new line of jewelry, but hasn't come close to holding up her end of the bargain ... according to a new suit.

Jewelry designer Kat Florence claims she and SJP teamed up in October 2015 to promote a new line of jewelry, design a special line of high-end products named after them ... and open 3 luxury shops in Europe with Parker's help in opening at least one of them.

Problem is, according to the docs, SJP signed a $7.5 million deal -- which was supposed to be for a 5-year commitment -- and began bailing on it almost immediately after the ink dried.

Florence claims Parker informed her she wouldn't be able to promote anything for 5 months because she was filming for her show, "Divorce," refused to attend jewelry events but promoted other personal ventures ... and refused to attend the launch of the London store, saying she was too busy.

As a result, the special line of SJP jewely was allegedly never launched and the London shop had to close.

Lil Uzi Vert's rocking a brand new house around his neck -- or at least the jewelry he's wearing could buy a nice house ... with a pool, even. In-ground!

The rapper dropped a whopping $425k -- as in damn near half a million dollars -- on a new piece that tips the scales at about 3.5 pounds. Now y'know how much 150 carats of diamonds on a 14 karat gold Cuban link chain weighs. We're told the shark tooth he's wearing with it is something he previously owned, so we're guessing he actually has more than $500k around his neck.

Uzi worked with Joe the Jeweler, aka Shyne, for about 2 months. You can tell he's thrilled with the end result. Sometimes all that glitters IS gold.

Tekashi69 just keeps throwing his money around and this time he's doing it on several pieces of bling that put a $22,500 hole in his pocket.

The NYC rapper linked with Houston-based jeweler JimmyBoi for a pair of rings and two new grills. One ring is of a spinning 69, while the other is a spinning rainbow made out of colorful enamel. There's about 15 carats of diamonds on both atop 14k gold. Grand total ... $17,500.

We're told the grills are made out of white gold and colorful enamel and cost about $5k.

As for that dent in 6ix9ine's bank account, hardly as bad as the one he might have after Saturday's Broner vs. Vargas fight. This is more like chump change.

If Lil Yachty's insane spinning globe chain looks familiar, that's because it used to dangle around rapper Cam'ron's neck before it got a major overhaul by a famous NYC jeweler.

We got Yachty leaving Rafaello & Co. Jewelers in the Big Apple Wednesday night with his new "Yachty's World" chain turning around his neck and it's got a super cool backstory. It once belonged to Killa Cam -- back in the early 2000s -- and read "Killa Cam Harlem World," but Cam traded it in for other pieces.

Gabriel Jacobs from Rafaello & Co. tells us it was next in line to be melted until Yachty stepped up and decided to give it the update. The spinning globe is battery operated and covered in about 150 carats of diamonds. Total price ... $250k.

Yachty was definitely thrilled with the purchase and not too concerned with any haters when we got him moments after he picked it up.

Safaree Samuels is steering clear of any bling that could possibly get him caught up at gunpoint again -- he'll just stick to some window shopping for now.

We got the 'Love & Hip Hop' star Wednesday leaving the Avianne & Co. jewelry shop in NYC, and asked if he'd picked up any ice. He makes it clear -- his chain game is on hold for now.

Can't blame him ... he was recently robbed at gunpoint in New Jersey, during which the alleged perpetrators jacked upwards of $180k in cash and jewelry. Turns out, the rapper knows one of the dudes arrested for the crime ... from back when he was dating Nicki Minaj.

Cardi B wasn't just glowing from her pregnancy during her Coachella performance Sunday ... she was also glowing thanks to a hefty, super expensive chain around her neck.

Celebrity jeweler Elliot Eliantte tells us Cardi put the idea of doing a Lola Bunny Chain in his ear about two months ago, but waited until 5 days before her main stage Coachella debut to actually put in the order.

Eliantte had to work overtime to get it done since the chain and pendant are littered with 110 carats of diamonds valued between $350k and $400k.

Scott Disick might not be keeping up with the Kardashians as much these days, but he's keeping up with the rappers he hangs out with, and the proof is hanging around his neck.

The bling spells out "Disick" in bubble letters with 2,291 diamonds, weighing in at 33.87 carats. We're told lord D dropped $80k on the pendant alone, and another $170k on the white and yellow gold chain ... which has 66.56 carats of ice!

Scott hangs with rappers like Quavo and Future, and we're told they inspired him to link up with Icebox Diamonds & Watches in Atlanta to get his own custom piece.

We're told Scott was thrilled with the final product. He better be after spending quarter of a mil!

Drake's dad is getting a sick new OVO pendant, just in time for Coachella, but it could've been swiped at LAX.

We got celeb jeweler Boodaddy Diamonds after he landed at the airport, and he immediately gave Migos serious props for their jewelry game ... which they'll definitely be rocking this weekend at the music fest.

Boo told us he'll be backstage with several artists, and revealed the special piece he was delivering to Dennis Graham. The pendant is blanketed in diamonds, and pretty stunning. Even more stunning? BD stepped away from it in the middle of the airport!!

Someone had his back, though and in the end, Dennis got his jewelry ... which he bragged on last night.

Floyd Mayweather is ready to go out in public again ... sitting courtside at the Miami Heat game on Wednesday -- the first time we've seen him since the shooting in Atlanta.

As we previously reported, Mayweather's longtime bodyguard, Greg La Rosa, was shot during an ambush on Floyd's 3-vehicle entourage early Monday morning. Cops believe the entourage was specifically targeted.

Cops are still trying to figure out why someone would want to kill Floyd or someone on his team -- but in the meantime, Mayweather picked up and went to Miami.

Rich the Kid was like a mom in Target when he hit up the jewelry store -- he ended up leaving with way more than what was on his shopping list.

The rap star went to Mo Jooma -- owner of Atlanta's Icebox Diamonds & Watches -- last week to pick up a couple Rich Forever Music (RFM) pendants he'd ordered in honor of the success of his brand new album, "The World Is Yours."

We're told while he was there, Rich started browsing other bling, put on a chain with a shiny diamond Jesus piece and didn't want to take it off ... so he decided to buy that too.

He was telling people it made him feel like Kanye.

When it was all said and done, we're told the rapper's spending spree totaled around $80,000.

Here it is ... the first photo of the 4.09 carat blue diamond Drew Brees bought for $8.1 MILLION.

It's pretty incredible ... but the QB says he overpaid by roughly $6 MILLION!

TMZ Sports broke the story ... Brees purchased the stone as an investment from Vahid Moradi of CJ Charles jewelers in San Diego back in 2015 -- but says he was completely duped.

For his part, Moradi and his attorney Eric M. George deny all wrongdoing and say Brees has no one to blame but himself.

Brees claims he trusted Moradi to get him the best prices on rare stones in the hopes of selling them for a profit at a later date.

Brees says in 2018 he had the stone appraised by an independent specialist who told him the diamond was only worth $2 million when he bought it ... and it has since increased in value to $3.75 mil.

There's more ... Brees is also furious over pink diamond earrings he bought in 2015 for $975k -- claiming Moradi used pink paint behind the diamond setting to make the stone appear more "pink" than its true color.

Brees says the pink stones are only worth $176k.

In total, Brees says he spent $15 mil with Moradi over the years -- but his stones are only worth roughly $6 mil ... a $9 million loss.