Bare diamonds are produced in the softest core layer under the hard surface of the earth. Most of them were produced 3.3 billion to 900 million light years ago, long before Tyrannosaurus Rex appeared. Bare diamonds are a form of carbon, which is the fourth most colorful element in planets of the solar system. Carbon is produced in the form of loose diamonds, which must have a high pressure of 45-60 kPa, a high temperature of 900- 1300℃ and a depth of 150-200 km, sometimes as deep as 660 km, and is located in the crisscross zone of the earth's core.
Rough diamonds are produced in the deepest part of the earth 150 km, and many extremely strict standards must be considered, so the formation probability of pure natural diamonds is extremely low. It needs a high temperature of about 1000℃ and a suitable working pressure for oxygen atoms to aggregate and produce loose diamond crystals.
The authoritative experts of Sotheby's auction house had previously estimated that the bid for this rough stone was $265,438+0-35 million. In the end, this rough stone set a new record for the auction price per carat in pink diamond with a cheap transaction amount of US$ 2,654,380 million. Together with taxes and auction fees, the total price of this rough stone is $26.6 million, which is also a world record of this kind of rough stone. Olivier Wagner, an outstanding jewelry authority expert of Sotheby's Paris branch, stressed to the satellite news agency that this is a large lavender pink loose diamond evaluated by the SPAR Institute in the UK in history. Rough diamonds of this size, color and purity are extremely rare, which is the first key rough diamond in Ukraine's output rate and bidding, and it is also the first time that rough diamonds of this color have been traded.