The proud owner of a €45 million diamond is SEVEN YEARS OLD!

If you thought that your childhood birthday presents were the business, then you might want to look away now. 

A Hong Kong businessman just dropped a record-breaking €45 million on a rare, 12.03-carat blue diamond for his 7-year-old daughter. 

That price tag — which is the highest ever for a diamond or gem sold at auction — breaks down to a record-breaking €3.7 million-plus per carat, according to Sotheby's, the auction house behind the sale. So basically, each carat of this blue beauty is worth almost 1,000 times the average amount spent on engagement rings around the world. 

The "Blue Moon diamond" was found in a South African mine. It has been graded the highest possible color quality for blue diamonds and deemed internally flawless by the Gemological Institute of America.

This bad boy was up for grabs as part of Sotheby's major jewelry sale in Geneva this week. A definite date in the diary for any jewelry aficionados who have some extra pennies lying around. 

The diamond's name comes from the phrase 'once in a blue moon'- but of course. 

"This show-stopping blue diamond surely is a once-in-a-lifetime stone," said David Bennett, Sotheby’s worldwide chairman of jewelry, in a statement. 

Sotheby's only identified the buyer as a private collector from Hong Kong. But The Guardian and many other media outlets have confirmed that it was purchased by billionaire Joseph Lau. 

Now named "The Blue Moon of Josephine," this giant rock isn't the first rare find Lau has gifted young Josephine. Just one day earlier, he reportedly dropped $28.5 million on a pink stone for her that he dubbed "Sweet Josephine." 

And you thought your trainers with the lights on them were the