London-based investment firm Pemberton Asset Management acquired the auction house for an undisclosed amount.
Gem Diamonds Uncovers 149-Carat Rough in Lesotho
It’s the company’s fourth high-quality diamond of more than 100 carats recovered so far this year.

London--The big finds for Gem Diamonds keep on coming.
The mining company announced Monday the discovery of a 149-carat, D color, Type IIa diamond at the Letšeng mine in Lesotho. The company said it is of “exceptional quality” and has an “excellent shape.”
This is the fourth high-quality diamond weighing more than 100 carats recovered by Gem Diamonds so far this year.
Last week, the company announced that it had found a D color, Type IIa stone weighing 910 carats at Letšeng.
This followed on the heels of the 110-carat and 117-carat diamonds found at the beginning of the year. Both were D color, Type IIa stones and also from Letšeng.
Gem Diamonds owns 70 percent of the mine, which is renowned for its large, high-quality white diamonds. It is the highest dollar-per-carat kimberlite mine in the world.
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