Christie's said that renowned jeweler Harry Winston was the buyer.
The "Pink Legacy", a diamond weighing just under 19 carats, fetched a record 50.375 million Swiss francs ($50 million) as it outshone all other auction lots at Christie's in Geneva on Tuesday.
Christie's chairman for Europe, Francois Curiel, called the stone the "Leonardo da Vinci" of diamonds.
Christie's global head of jewellery, Rahul Kadakia, described The Pink Legacy as "one of the world's greatest diamonds".
The Pink Legacy, an 18.96 carat fancy vivid pink diamond once owned by Oppenheimer family is displayed on November 8, 2018 during a press preview ahead of sales by Christie's auction house in Geneva.
The auction price of the Pink Legacy diamond, sold at Christie's annual Magnificent Jewels auction, beat out the previous record price-per-carat.
Full Name of Pippa Middleton's Son Has Reportedly Leaked
Middleton married Matthews, a 43-year-old hedge fund manager and brother of British reality star Spencer Matthews, in May 2017. Pippa gave birth to her first child weighing 8lb and 9oz at the Lindo Wing, at St Mary's Hospital, Paddington, on 15 October.
It's the largest fancy vivid pink diamond they've ever sold.
Christie's auction house jewellery specialist Rachel Evans-Omeyer poses with an 18.96 carat Fancy Vivid Pink Diamond on show in London on September 25, 2018 before its November auction with an estimate at USA $30 to $50 million.
"Portrait of an Artist (Pool with Two Figures)" is set to be sold at the Christie's Post-War and Contemporary Art Evening Sale at New York's Rockefeller Center on November 15 for an estimated price of $80 million.
The rectangular-cut stone was found in a South African mine around a hundred years ago and has likely not been altered since it was first cut in 1920, Christie's said.
The classic rectangular cut is traditionally used for white stones, but is rare for pink diamonds.
Finding a fancy vivid pink diamond larger than 10 carats is virtually unheard of, the auction house said.
The success of the Seahawks' running game is what has Carroll confident about his team's hopes of contending for a playoff spot. Despite all of the pessimism up to this point, the Seahawks had another impressive showing against the Rams on Sunday.
They haven't scored a touchdown in nine quarters and this adds to the long list of things that need improvement. Clearly there were other options, but the play was designed for Jalen Richard who was covered.
Trump as a effect , refused to sign the G7 statement and hinted at other tariff measures against the USA neighbor to the north. The president noted that both countries made excellent wine, but said that France had higher tariffs than the United States.
The latest round of violence began on Sunday, when Israeli special forces were exposed operating inside the Gaza Strip. At least 234 Palestinians in Gaza have since been killed by Israeli fire, the majority during protests and clashes.
The emergency system is meant to manoeuvrer the plane out of a stall, when its nose is often angled too sharply upward. The airspeed indicator is like a speedometer and tells the pilot how fast the plane is moving through the air.
Rickie Fowler, last year's runner-up, is back at 10 under after only managing a two-under 69 in the third round. But after making two bogeys over the first 67 holes in the tournament, he made two bogeys in two holes on Nos.
Will Addison stepped in to make his first start and didn't let Ireland down, but Ireland will want to restore Ringrose with Bundee Aki. "It has been two years since we've played them last but there has been a lot of changeover from our team", he said.
But the latest deal is smaller than a $6.5 billion bid that prominent investor Elliott Management Corp. made in May. Athenahealth's stock was up almost 10% between market close on Friday and the middle of the trading day Monday.
On Tuesday , first lady Melania Trump publicly called for the ouster of a senior member of her husband's administration. He reportedly told Kelly to give the first lady whatever she wanted, adding: 'I don't need this shit'.
Was mysterious object spotted in space an alien probe?
This might have been the result of cometary outgassing, but there is no evidence for a cometary tail around it. But that's usually seen in comets - which typically break completely apart if they get that near to the sun.
Project Fi phones are now secure 24/7 with free Google VPN
In the security and privacy department, Google is extending its Project Fi VPN service over to cellular (LTE) connections. Google made sure to clarify that your traffic is not tied to your Google account or phone number in any way.
Opec's supply cut bid pumps up oil price
Brent crude dropped below $70 a barrel on Friday for the first time since April but it was trading above $71 a barrel on Monday. Oil futures in NY fell 0.4 percent Monday, extending a record 11th day of declines, to end the session at $59.93 a barrel.