Massive, 5,655-Carat 'Lion Emerald' Unearthed in Africa

CAIRO, Nov. 5 (SEE) - Miners in Zambia have discovered a massive crystal which is 5,655 carats and weighs about 2.5 pounds (1.1 kilograms) — about the mass of an adult human brain, livescience.com reported.

The emerald will be auctioned off in Singapore later this month, according to a statement from Gemfields — the British mining company that owns 75 percent of the mine where the emerald was unearthed. (The Zambian government owns the remaining 25 percent.)

The emerald was discovered on Oct. 2 at Kagem, the world's largest emerald mine, in central Zambia.

The company has promised to pide 10 percent of the emerald's sale value between two local lion conservation groups — the Zambian Carnivore Program and the Niassa Carnivore Project. For this reason, Gemfields has named the stone "Inkalmu" which translates to "lion" in the local Zambia Bemba language.

After being sold, it's possible that Inkalmu will be pided into many hundreds of inpidual stones, Gemfields experts said.

Emeralds form over hundreds of millions of years as the fluid from cooling magma rises through various layers of deep-Earth minerals. According to the Kagem website, Zambian emeralds are the product of ancient reactions between two types of rock — talc magnetite schist (a black rock that formed about 1.8 billion years ago) and pegmatite (a white rock that formed a scant 500 million years ago). Using complex geological models, scientists at Kagem attempt to map out exactly where the largest intersections between these two types of rock are most likely to occur in the mine's approximately 16-square-mile (41 square kilometer) territory.

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.