Discover Imboo, the 11,685 carat ‘Buffalo’ emerald unveiled by Gemfields. Learn about its origin at Zambia’s Kagem Mine, its unique color, clarity, and traceability features ahead of the September 2025 emerald auction.
The stone will appear at Gemfields’ high-quality emerald auction taking place 25 August – 11 September 2025.
Key Facts About Imboo
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Weight: 11,685 carats
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Origin: Kagem Mine, Zambia
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Owner: Gemfields (75%) and the Zambian Government through IDC (25%)
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Mining location: Copperbelt Province, Zambia
Why Imboo Matters
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Largest discovery at Kagem Mine – the world’s biggest emerald-producing mine.
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Shows an intense green color with golden tones even under strong light.
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Offers exceptional clarity for a gemstone of this scale.
Adrian Banks, Managing Director of Product and Sales at Gemfields, describes Imboo as a stone that captivates the eye with its color and depth.
Provenance and Traceability
The new owner will benefit from nanoparticle-tagging technology developed by Provenance Proof.
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This system allows full traceability of Imboo even after cutting and polishing.
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Future owners can always verify the emerald’s origin at Kagem Mine.
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This adds long-term confidence and authenticity to the purchase.
What This Means for You
If you follow rare gemstone auctions, Imboo sets a new benchmark.
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Would you invest in such a historical stone?
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Do you value traceability when buying gems?
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How will this discovery influence the global emerald market?
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