Zambian Emeralds: An Unmissable Terroir
A Zambian emerald is an emerald extracted from deposits in Zambia's Copperbelt province, mainly from the Kagem mine in the Kafubu region. Zambia is the world's second-largest producer of emeralds after Colombia, and the Kagem mine alone supplies approximately 25% of global production.
Zambian emeralds are distinguished by a bluer and darker green than Colombian emeralds, due to the presence of iron in the parent rock. They generally have fewer visible inclusions, making them clearer stones and more resistant to faceting. Their price per carat remains lower than that of Colombian emeralds of comparable quality.
For a long time, talking about emeralds meant talking about Colombia. That era is over. Since the 2010s, Zambia has established itself as a major player in the global market — not only in volume, where it surpasses Colombia, but also in quality, where its stones attract a growing number of jewelers. Here's what you need to know about this now essential terroir.
Zambia's place in the global market
Zambia is the world's second-largest producer of emeralds by value, behind Colombia. But in terms of volume, it regularly surpasses Colombia. The producing region is concentrated in the Copperbelt province, in the north-central part of the country, around the Kafubu River.
The commercial history of Zambian emeralds is recent. The first discoveries of beryl in the area date back to 1928, but significant exploitation only began in the 1970s. The market truly became structured from 2008, when the British group Gemfields took over the Kagem mine in partnership with the Zambian government.
Today, Zambia plays a stabilizing role in the global market. When Colombian production fluctuates or exports are disrupted, Zambia supplies workshops in Jaipur, Bangkok, and Antwerp. Gemfields' auctions in Singapore and Bangkok have sold over a billion dollars worth of rough Zambian emeralds since 2009.
The major mines: Kagem and the Kafubu area
The Kafubu area, located south of Kitwe and west of Ndola, concentrates most of Zambia's production. It covers approximately 200 km² classified as the Ndola Rural Emerald Restricted Area by the government.
Kagem, the world's largest emerald mine
Kagem is the world's largest open-pit emerald mine. It is 75% owned by Gemfields and 25% by the Zambian government via the Industrial Development Corporation. The site covers 41 km² and plunges 160 meters deep into its main pit, Chama.
Kagem alone produces approximately 25% of the world's emerald production. In 2024, it extracted 40.3 million carats of emerald and beryl, including 159,351 carats classified as "premium" quality. The mine employs approximately 1,150 people and is ISO 14001 (environmental) and ISO 45001 (health and safety) certified.
Other mines in the area
- Grizzly Mining: second largest producer in the area, independent operation
- Kamakanga: historic deposit, more artisanal production
- Chantete and Pirala: smaller sites, complementary production
- Chibolele and Fibolele: extensions of the Kagem perimeter, opened more recently
All these mines form a mining ecosystem whose cumulative production represents well over 25% of the global market.
The particular geology of Zambian emeralds
Zambian emeralds belong to the category of schist-hosted deposits, similar to emeralds from Brazil, Madagascar, or Russia. This distinguishes them geologically from Colombian emeralds, which form in sedimentary rocks.
Crystallization occurs at the interface between two types of rock: a talc-magnetite schist rich in chromium and iron, and pegmatites rich in beryllium. Emeralds form in the reaction zone between the two, where these chemical elements combine.
Zambian emeralds are among the oldest in the world: crystallization occurred approximately 500 million years ago, in metamorphic rocks that are themselves 1.6 billion years old. By comparison, Colombian emeralds are "only" 30 to 65 million years old.
The Zambian color: why the bluish tint
The visual signature of Zambian emeralds is their slightly bluish green, often darker than that of Colombian emeralds. This nuance is not a geological accident: it comes directly from the chemistry of the parent rock.
Every emerald gets its green from a coloring agent that replaces aluminum in the beryl structure. In Colombia, this agent is mainly chromium, which gives a pure and warm green. In Zambia, chromium is also present, but accompanied by a notable amount of iron. Iron adds a blue component to the hue, shifting the color towards blue-green.
Practical consequences for the buyer:
- A denser and deeper green under certain lights
- A more stable color under lighting than Colombian emeralds (which can appear greener in sunlight and yellower in artificial light)
- Stones that are often darker at equal weight, which may be more suitable for settings in yellow or rose gold
Zambian vs. Colombian emerald: the differences
The two origins are not in opposition; they offer different characteristics. Here is a synthetic comparison.
| Criterion | Zambia | Colombia |
|---|---|---|
| Dominant hue | Bluish green, darker | Pure green to slightly yellowish green, warmer |
| Coloring agents | Chromium + iron | Chromium + vanadium |
| Deposit type | Schist (Type IA) | Sedimentary rocks (Type IIB) |
| Characteristic inclusions | Two-phase inclusions (liquid + gas), actinolite, magnetite | Three-phase inclusions (crystal + liquid + gas) |
| Average clarity | Often clearer, fewer visible inclusions | More included, the "garden" is more pronounced |
| Color stability | More stable depending on lighting | More variable depending on lighting |
| Price per carat (equal quality) | 20 to 40% lower on average | High reference of the market |
| Market availability | High, stable production | Medium, more artisanal production |
The choice between Zambia and Colombia depends on taste and budget. A good quality Zambian emerald offers excellent color-price value. A Colombian emerald remains the benchmark for those seeking the purest green, provided they accept more inclusions and a higher price.
The price of Zambian emeralds
The price of a Zambian emerald follows the same 4C logic as all emeralds: color, clarity, cut, carat. But at comparable quality, there is a discount of 20 to 40% compared to an equivalent Colombian emerald.
Here is a rough estimate for the 2026 market (faceted stones):
| Quality | Price per carat |
|---|---|
| Commercial (average color, visible inclusions) | €50 to €250 |
| Good quality (strong green, few visible inclusions) | €500 to €1,800 |
| Fine quality (vivid bluish green, semi-translucent) | €2,500 to €8,000 |
| Exceptional (large weight, saturated color, superior clarity) | €10,000 and above |
Gemfields' auctions provide a useful benchmark: in September 2025, the average price per carat for rough stones of superior quality was 160.78 USD per carat. Once cut, polished, and certified, these stones are resold 5 to 10 times this price on the retail market.
Looking to understand emeralds before buying?
At Johya, every stone we offer is documented: origin, dealer, certificate. We regularly publish educational guides on gemology and emerald origins.
Frequently asked questions about Zambian emeralds
Is a Zambian emerald inferior to a Colombian emerald?
No, just different. Zambia produces stones with a bluer and darker green, generally with fewer visible inclusions than Colombian emeralds. At comparable quality, they cost 20 to 40% less, making them an excellent choice for those who want a beautiful stone without paying the premium for Colombian origin.
How to recognize a Zambian emerald?
Color is the first clue: the green leans towards blue and remains dark. Under a loupe, the inclusions differ: Zambian emeralds typically contain two-phase inclusions (liquid and gas) with actinolite or magnetite crystals. Colombian emeralds, on the other hand, have characteristic three-phase inclusions. Only a gemological certificate from a recognized laboratory guarantees the origin.
Are Zambian emeralds oil-treated?
Like almost all emeralds on the market, yes. Oil treatment (cedar, paraffin, or light resin) fills fissures and improves visual transparency. This applies to both Zambian and Colombian emeralds. The degree of treatment (minor, moderate, significant) must be indicated on the certificate.
Is Zambia really the 2nd largest producer in the world?
Yes, in terms of the value of gem-quality stones. The Kagem mine alone produces approximately 25% of the world's emerald output. In terms of rough volume, Zambia even regularly surpasses Colombia. The benchmark in value, however, remains Colombia, whose best stones command higher prices.
What is the largest emerald found in Zambia?
The Inkalamu, or "Lion Emerald," discovered in 2018 at Kagem. It weighed 5,655 carats, or approximately 1.1 kg. It was sold to Indian jeweler Diacolor for an undisclosed price. Gemfields donated 10% of the sale to wildlife conservation programs.
Is a Zambian emerald a good investment?
The market for quality emeralds remains resilient, and Zambian emeralds have increased in value over the past 15 years as their quality gains recognition. But as with any precious stone, investment only makes sense in the long term and with certified, high-quality pieces. Commercial stones do not appreciate in value.
Cited Source — For gemological characteristics and mapping of Zambian deposits, see the Gemological Institute of America study on the Kagem mine.