Kite Brilliant Cut 1.15 tcw H SI1 Matched Loose Diamonds
Journey Diamond Jewelry

Lesotho Promise: Largest Diamond Found this Century

A 603-carat white diamond has been found at the Letseng mine in Lesotho.  The mine’s joint owners, South Africa’s Gem Diamond Mining and the Lesotho government, will put the diamond up for sale in Antwerp on October 4th.  That day marks the 40th anniversary of the Kingdom of Lesotho and its independence from British rule.

The diamond, named the Lesotho Promise, is the largest diamond reported this century and ranks as the 15th largest diamond ever found.  The previous largest diamond found at the Letseng mine was the 6.01 carat Lesotho Brown in 1967.

Letseng_mineThe Letseng mine is the world’s highest operating diamond mine, located 3.1 kilometers above sea level where temperatures reach -20 degrees Centigrade.  The mine also has the highest percentage of large diamonds (over 10 carats) of any known kimberlite mine while having relatively low carat weight per ton of ore production.  The mine has produced four diamonds over 500 carats since it started operations and numerous stones over 100 carats in weight.

Letseng’s two kimberlite pipes contain an estimated 2.3 million carats of economically mineable diamonds, which would take 25 years to mine.

Learn more about diamond mining...


Feed You can follow this conversation by subscribing to the comment feed for this post.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been saved. Comments are moderated and will not appear until approved by the author. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Comments are moderated, and will not appear until the author has approved them.

Your Information

(Name is required. Email address will not be displayed with the comment.)