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Gem Diamonds

Gem Diamonds is a diamond mining company listed on the London Stock Exchange, with its primary operating asset being the Letšeng mine in Lesotho. The company focuses on the recovery of large, high-value diamonds, including exceptional white diamonds for which Letšeng is internationally recognised. Its operations span exploration, extraction and sale of rough diamonds, with output marketed through tenders to international buyers. Gem Diamonds' headquarters are in London, while its principal mining operations are based in Lesotho, southern Africa. The company has built a reputation for recovering some of the world's largest and most valuable rough diamonds, which command premium prices at auction. Clifford Elphick served as chief executive and was closely associated with the company's growth and strategic direction. Gem Diamonds' fortunes are closely tied to fluctuations in the global diamond market, including competition from synthetic, laboratory-grown diamonds, which have introduced pricing pressure into parts of the industry. The company has periodically pursued expansion and efficiency projects at Letšeng to extend the mine's life and improve recovery rates. Gem Diamonds was established in the early twenty-first century and grew through acquisitions of diamond assets before consolidating its portfolio around Letšeng. It remains one of the more prominent independent diamond miners operating in Africa, distinct from larger diversified miners with diamond divisions.

Gem Diamonds News


An image of the Letšeng mine
Gem Diamonds reports improved first-half financial performance
3rd September 2026 By: Tasneem Bulbulia

London-listed Gem Diamonds reported a significantly improved financial performance for the six months ended June 30, compared with the same period last year, with revenue having increased by 32% to... 


The Letšeng mine
Higher prices boost Gem Diamonds' first-half earnings, despite lower output
28th July 2026 By: Creamer Media Reporter

Despite a 12% year-on-year decrease in recovered carats to 41 695 ct for the first six months of this year, London-listed Gem Diamonds recorded a 33% year-on-year increase in sales value to... 


A generic image of a diamond
Gem Diamonds reports lower sales volumes, but higher prices for the first quarter
20th May 2026 By: Lumkile Nkomfe

Diamond miner Gem Diamonds recorded revenue of $32.1-million for the quarter ended March 31, supported by the sale of large, high-value diamonds recovered at its Letšeng mine, in Lesotho. During... 


A white diamond from Letšeng mine
Gem Diamonds posts $104m attributable loss amid rough diamond market downturn
18th March 2026 By: Marleny Arnoldi

Like most diamond miners, London-listed Gem Diamonds has been experiencing marked weakness in the diamond market, which led to the company reporting a loss of $9.1-million before exceptional items... 


The Letšeng mine
Gem exceeds production, sales guidance
4th February 2026 By: Creamer Media Reporter

London-listed Gem Diamonds, which owns and operates the Letšeng mine, in Lesotho, recovered 90 354 ct of diamonds and sold 88 381 ct of diamonds in the financial year ended December 31.  While... 


The Letšeng diamond mine
Gem flags lower third-quarter output on the back of cost reduction measures
30th October 2025 By: Creamer Media Reporter

London-listed Gem Diamonds, which operates the Letšeng mine, in Lesotho, reports that decisive measures to conserve cash have been completed, with the anticipated $1.5-million in monthly saving... 


The Letseng mine
Gem Diamonds swings to loss on $10.7m impairment
4th September 2025 By: Creamer Media Reporter

London-listed Gem Diamonds, which owns and operates the Letšeng mine, in Lesotho, has swung to an attributable loss of $11.7-million for the six months ended June 30, on the back of a $10.7-million... 


The Letšeng diamond mine
Gem may cut Letšeng workforce by 20%
23rd July 2025 By: Chanel de Bruyn

London-listed Gem Diamonds’ share price fell by more than 22% on July 23 after the company announced plans to scale back operations at its Letšeng mine, in Lesotho, to reduce costs in a difficult... 


An image of Gem Diamonds CEO Clifford Elphick
Gem Diamonds weathers challenges, delivers solid full-year performance
13th March 2025 By: Tasneem Bulbulia

London-listed Gem Diamonds’ focus on cost containment, operational efficiencies and appropriate capital allocation yielded pleasing results for the financial year ended December 31, 2024, despite a... 


The Letšeng mine in Lesotho
Gem beats revised production, sales guidance
29th January 2025 By: Creamer Media Reporter

London-listed Gem Diamonds, which owns and operates the Letšeng mine, in Lesotho, recovered 24 461 ct of diamonds in the fourth quarter of 2024, taking full-year production to 105 012 ct. Although... 


An image showing the Letšeng mine
Gem Diamonds announces extended life-of-mine plan, revolving credit facilities
3rd December 2024 By: Tasneem Bulbulia

London-listed Gem Diamonds has announced a revised life-of-mine plan for its Letšeng mine, in Lesotho, as well as a two-year extension to the group’s revolving credit facilities.  The revised plan... 


The Letšeng diamond mine
Gem lifts third-quarter revenue on higher sales, prices
23rd October 2024 By: Creamer Media Reporter

London-listed Gem Diamonds, which operates the Letšeng diamond mine in Lesotho, generated revenues of $42.7-million from the sale of 26 627 ct of diamonds in the quarter ended September 30. This... 


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pqt: 0.052s - ct: 0.098s - 211pq - 2rq
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