Bling!

Sylvester Stallone and Rob Kardashian are practically blood bros -- if they bled diamonds and gold -- since Sly just dropped big bucks for a Rolex from Rob's favorite jeweler.

Sources familiar with the deal tell us Stallone hit up celeb jeweler, Nick Bhindi for an 18k white gold GMT Master II -- which just sounds expensive, right? It is.

We're told the diamond and sapphire-encrusted piece set Rocky back just over $84k.

It's a collector's item for sure. The Rollie -- very similar to Rob's -- is now out of production.

Minnesota Vikings speedster Cordarrelle Patterson is showing love like all rich men do ... with diamonds ... blingin' out a custom neck piece to honor the two schools he loves.

TMZ Sports spoke to Albert Bekdas -- owner of Labelle Jewelry in New Jersey -- who tells us CP tasked him with combining his high school and college logos into one kick-ass piece.

That apparently entailed combining 10 carats of diamonds with 5 carats of sapphires into a shiny behemoth that set Patterson back over $15K.

And you thought showing up to the reunion was enough ... slacker.

Kylie Jenner is starting the summer off grilling with a new 18-karat rose gold mouthpiece.

If you recall ... Kylie was gifted a bottom grill by ex Tyga, but like her men -- she's moving on to a new piece.

A source tells us Kylie's new mouth bling was made by Nick Bhindi of Bhindi jewelers.

Normally it'd set the average person back $4,000 and take a week to complete after casting, but for Kylie ... they got it done in 2 days.

Rob Kardashian and Blac Chyna clearly aren't sweating childcare expenses ... not based on the lavish timepieces they just purchased.

A source tells TMZ the newly-engaged couple met with celebrity jeweler Nick Bhindi to pick out his ... and hers Rolexes. Rob opted for a gold GMT Master 2, which is no longer in production, meaning it's worth a bunch. Chyna walked away with 2 rose gold watches.

We're told Rob's was the priciest at around $150,000, and Chyna's diamond-encrusted Rolie was $90k. Her diamond-free one was a far more reasonable $35k.

Ex-Playboy Playmate Ashley Mattingly called the police on a man she says angrily showed up at her home after a year of flooding her with calls and texts.

Ashley, Miss March 2011, tells TMZ ... a guy named Joey claimed to be a DJ and contacted her about doing a club appearance, which she ultimately turned down. Ashley claims Joey kept reaching out anyway -- and even left her a sterling silver Tiffany necklace on Easter.

But according to the police report filed by Ashley, and obtained by TMZ, he showed up at her Orange County home last month and took back the necklace. Ashley called police to report a "stalking," but Joey was gone by the time cops got there.

Ashley wanted the incident documented, but didn't want to press charges.

Joey admits taking back the necklace, but says he's no stalker. Police reviewed text messages and say they didn't see anything threatening.

Scott Disick was hit by thieves where he lives ... and they took a fortune in watches and jewelry ... TMZ has learned.

Disick was in Cannes late last week when someone got into his Hidden Hills home and looted his famous watch collection. Scott has publicly bragged about the timepieces, which include a Rolex Yacht-Master II valued at $32,000. Another watch goes for $48,000.

We don't know how many watches were taken, but law enforcement tells us there were "multiples worth a significant amount of money."

Von Miller continued his baller diamond binge ... this time, dropping $25k on an iced out custom Super Bowl MVP ring, complete with 15 carats in diamonds!

It was all part of a $120k shopping spree at the exclusive Avianne & Co. in NYC -- where the Denver Broncos superstar also scooped up a diamond tennis chain and a fancy cross pendant.

But the ring ... damn.

We're told it's comprised of 14 karat rose gold and covered with VS quality diamonds.

The top has the letters MBG -- which we're told stands for Money Bag Gang (Von's crew of close friends).

The side has an image of Texas -- Von's home state.

Von's reportedly expecting to sign a $100 million contract this offseason -- so, why not treat yo'self, right??

There's one shiny part of Johnny Manziel's nightmare spring ... his face ... 'cause the Hollywood bad boy has officially followed the lead of his old teammate Von Miller ... and copped a custom grill.

We noticed the ice when we got Johnny leaving Warwick nightclub in Hollywood ... sporting a twinkle in his smile we hadn't seen before.

That caused us to do a little digging ... and it turns out Manziel hit up celebrity grillsmith Johnny Dang and commissioned some custom swag for his chompers.

Dang was mum on how much Manziel's 18 karat white gold, diamond encrusted creation actually cost ... but said similar pieces he's done in the past would set you back around $20k.

Keep swaggin' Johnny ... it's your job now.

Sorry 'Lion King' ... too bad "Aladdin" ... suck it up "Toy Story" ... boxing star Adrien Broner says none of you are his favorite Disney movie ... opting for a tale closer to his heart, wrists and fingers.

Broner was out in NYC copping some new bling at Avianne & Co when our camera guy decided to ask a question central to understanding the way a real man thinks.

What's your favorite Disney movie?

Check out the clip ... Broner tells our guy he likes the tale featuring Anna and Elsa ... which is of course "Frozen" ... saying the movie reminds him of his general state of being.

We say "The Little Mermaid" ... but that's just for the songs.

He's about to become a millionaire overnight -- so top NFL prospect Artie Burns decided to celebrate early ... by dropping $41k on some sick jewelry, TMZ Sports has learned.

The former University of Miami star is projected to go in the 1st or 2nd round ... and earlier this week, he swung over to Joe Avianne's at Avianne and Co. in NYC to ice up.

"Artie came through and picked up a 2-tone Rolex ($19k), a diamond cross ($3k) and a diamond tennis chain ($19k)," Avianne tells us.

So what's Artie's next purchase? Hopefully a safe.

Fetty Wap could be rolling in a brand new Lambo right now, but instead he opted for a chain and a couple of watches ... for major cheese.

Fetty copped a 75 carat gold Cuban chain, a matching Cuban bracelet (just 25 carat gold though) and 2 Day-Date Rollies ... fully iced out. Total shopping spree price tag: $350,000!

The rapper made his purchases at Avianne & Co. Jewelers in NYC -- the same spot 2 Chainz swears by for new pieces.

Hopefully Fetty had some extra cash to pick up diapers. Diamond encrusted, of course.

Ex-NFL star Kerry Rhodes is officially showing off ... showing off his super hot fiancee -- "Hall Pass" actress Nicky Whelan -- and her impressive engagement ring on a night out in NYC.

Floyd Mayweather is still finding ways to show us he's rich as hell ... this time it's hooking up with one of NYC's best jewelers and copping a neck piece worth A QUARTER MILLION DOLLARS.

The money man stopped into the Mr. Flawless jewelry store in Manhattan on Thursday and went HAM ... copping a "double lion head cuban bust down no lock."

We don't really know what the hell that means ... but we do know the gold and diamond chain weighs a monstrous 1,200 grams and set Mr. Mayweather back an INSANE $250k.

Floyd's been on a spree recently ... earlier this week we saw him cop $500k for his girlfriend Bad Medina ... the 4th car he's bought her in two years.

Vanessa Bryant says Kobe gave her all 5 of his NBA Championship rings ... increasing her collection of insanely expensive Kobe Bryant gift rings to 6.

Rob Kardashian was so eager to get engaged he popped the question literally the minute he got the ring from the jeweler ... and it happened so fast the jeweler saw the whole thing!

Ben Baller, who sold Rob the rock for $325k, told us Wednesday they've been friends for years, and he actually grilled Rob about his decision to marry Blac Chyna.

Turns out Ben witnessed the proposal.

One more interesting thing ... Ben says it took him 5 days to get the ring ready. That really does make it look like Rob schemed to pop the question when his family was out of town.

Rob Kardashian blindsided his family ... not giving them a heads up or even a hint about his engagement.

Sources familiar with the situation tell us, Rob went to great lengths to keep Kim and company in the dark. We're told the proposal was "aggressively on the QT."

Our sources say Rob timed the proposal to go down when the family was away. The klan flew to Vail hours before he popped the question to Blac Chyna.