Letšeng Mine in Lesotho Sees Sharp Revenue Decline Amid Global Diamond Market Challenges The Letšeng diamond mine in Lesotho, known for producing some of the world’s highest-value diamonds per carat, experienced a significant revenue decline in 2025. Gem Diamonds, the mine’s owner, reported on February 4, 2026, that Letšeng generated $97.7 million, down 36% from $152.8 million in 2024. The drop is attributed to a 14% fall in production and a 20% decrease in the
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