Gemfields has unveiled “Imboo”, an 11 685 ct emerald discovered at its 75%-owned Kagem mine in Zambia, describing it as the largest exceptional gemstone ever recovered from the operation. The stone will headline the company’s high-quality emerald auction that commenced on August 25 and will continue until September 11, 2025.

Join our WhatsApp channel for more updates on Gemfields

Located in Zambia’s Copperbelt Province, Kagem is believed to be the world’s largest producing emerald mine and is operated in partnership with the Zambian government through the Industrial Development Corporation.

Adrian Banks, Gemfields’ Managing Director of Product and Sales, said Imboo displays “an intense, verdant green touched with golden warmth and a clarity that captivates the eye,” even under the strong light required to illuminate a stone of its size.

ALSO READ:
Gemfields’ Kagem Mine to resume targeted open-pit operations

In addition to its rarity, the buyer will be offered nanoparticle tagging through Gemfields’ partner Provenance Proof, ensuring the gemstone remains fully traceable even after cutting and polishing.

The company said this technology guarantees future owners can verify the stone’s origin and its place in the history of Kagem.

The unveiling of Imboo follows a series of remarkable discoveries from Kagem in recent years, underscoring the mine’s reputation as a source of some of the world’s most significant emeralds.