Miners in Zambia, in Africa, have discovered a large emerald, weighing 1.1kg and worth an estimated £2m. The gem was found by mining company Gemfields at Kagem, the world's largest emerald mine, on 2 October, 2018. The emerald is 5,655 carats and weighs about 2.5 pounds (1.1 kilograms), about the mass of an adult human brain.

The company has promised to divide 10 percent of the emerald's auction sale profits between two local lion conservation groups, the Zambian Carnivore Programme and the Niassa Carnivore Project.

Gemfields has named the stone 'Inkalamu,' which translates to "lion" in the local Zambia Bemba language. It's possible that Inkalmu will be divided into many hundreds of individual stones.

Emeralds form over hundreds of millions of years as the fluid from cooling magma rises through various layers of deep-Earth minerals. Zambian emeralds are the product of ancient reactions between two types of rock.

While 'Inkalamu' is certifiably massive, it's not the largest emerald ever pulled out of Kagem. That honor goes to a 6,225-carat emerald mined in 2010. Gemfields named this stone "Insofu" — the Bemba word for "elephant" — for its massive size. Infosu was auctioned off in 2017 for an undisclosed price.

The world's largest uncut emerald, the so-called Bahia emerald, was unearthed in Brazil in 2001. It weighs nearly 800 pounds (360 kg), has been stolen multiple times and was once listed for sale on eBay at $75 million.

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