Jan 16, 2018 13:00:00

The world's largest rough diamond of 910 carats is excavated

by

wu yi

A 910 carat rough diamond was found at a diamond mine in the Kingdom of Lesotho in southern Africa. It is the fifth largest diamond ever excavated.

recovery-of-910-carat-diamond.pdf
https://www.gemdiamonds.com/downloads/2018/press/recovery-of-910-carat-diamond.pdf

910-carat diamond discovered in southern Africa is among the biggest in history --LA Times
http://www.latimes.com/business/la-fi-lesotho-mine-diamond-20180115-story.html

This is a 910 carat rough diamond. The color is D color, that is, colorless and belongs to Type IIa. Type IIa is a rare type of diamond that does not contain impurities such as nitrogen and is said to be present in only 1 to 2% of the total.

The Letzeng Diamond Mine has a reputation for diamond quality and size, and diamonds produced at the Letzeng Diamond Mine are traded at the highest prices worldwide. Gem Diamonds, which discovered a 910 carat rough diamond this time, sold 357 carats mined from the mine in 2015 for $ 19.3 million, and in 2006 a rough diamond called Resoto Promise. Has been auctioned off for $ 12.4 million.

The largest rough diamond ever excavated is the 3106 carat ' Cullinan ', the second is the 1109 carat 'Lesedi La Rona', the 995 carat 'Excelsior' and the 969 carat 'Star of'.・ Sierra Leone ”.

In 2015, Recedi La Rona was sold for 5.9 billion yen, but in the same year, a smaller 813 carat rough was sold for about 7 billion yen, not only for the size of the diamond but also for the size. Where multiple elements are involved. It's unclear at the time of writing how much the 910-carat diamond discovered this time will cost, but Clifford Elphick of Gem Diamonds said the diamond doesn't contain large impurities, so it's $ 40 million. Yen) I think it is more than that.