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Koidu Diamond Mine
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The Koidu Diamond Mine in the Kono District is the premier primary diamond mining operation in Sierra Leone, targeting kimberlite pipes rather than alluvial deposits. This industrial facility utilizes sophisticated open-pit and underground mining techniques to extract diamonds directly from the host rock. Owned and operated by Koidu Limited, a subsidiary of the Octea Group, the mine is celebrated for producing gemstones of exceptional quality and significant size. Following the cessation of the civil war, operations were revitalized in 2003, leading to substantial technological upgrades in the processing plants. The mine serves as a critical asset for the national economy, driving a large portion of the formal diamond export market. Beyond its economic output, the operation faces ongoing responsibilities regarding environmental mitigation and community development in the surrounding Koidu area.
- Location: Sierra Leone
- Nearby: Boajibu (32 km)
Best time to visit & climate
The most pleasant time to visit is Jan, Nov, Dec.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 26 | 28 | 29 | 29 | 27 | 25 | 24 | 23 | 24 | 25 | 25 | 25 |
| Rain mm | 1 | 5 | 13 | 38 | 112 | 300 | 450 | 522 | 367 | 162 | 50 | 4 |
📋 Practical info
What is this place?
The Koidu Diamond Mine is the largest diamond mine in Sierra Leone, producing high-quality gemstones from kimberlite pipes. It plays a significant role in Sierra Leone's economy, creating jobs and generating foreign exchange through rough diamond exports.
Visiting
The mine is an active, secured excavation site not open to the public. There are no regular visiting opportunities, as security and operational procedures do not allow it.
Where to view it
From the main road passing the mine, the waste dumps and access road to the pit are visible. A better view is from the hill east of Koidu, from which part of the open-pit mine can be distinguished.
Local products
Diamonds are the main product, but they are sold in rough form, not processed on site. In the Koidu region, local markets offer handmade silver and copper jewelry, traditional batik fabrics, and agricultural products like rice and cassava.
Active season
Diamond mining takes place year-round, with the dry season from November to April offering the best accessibility for heavy machinery. During the rainy season (May to October), production may be limited due to flooding and poor road conditions.
Nearby
The town of Koidu can be combined with the Kangari Hills Forest Reserve, known for its biodiversity and hiking trails. Traditional villages of the Kono ethnic group also offer insights into local customs and crafts.
Geography
Facts
- Mining operations target two distinct vertical kimberlite pipes.
- Industrial-scale mining was officially restarted in 2003.
- Koidu Limited is 100% owned by the Octea Group.
- It is the first mine in Sierra Leone to implement large-scale underground mining.
- The mine produces an estimated 400,000 carats of diamonds per year.
- The site has yielded several significant diamonds exceeding 100 carats.
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Notable places around
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Sights in the town Koidu Diamond Mine (1)
Sights nearby
Frequently asked questions
Is the Koidu diamond mine accessible?
No, the site is a strictly guarded restricted area.
Why is Koidu famous?
Koidu is known for mining high-quality industrial diamonds.
When is the best time for the region?
The dry season (November to April) is climatically the most pleasant.
Can you buy diamonds?
Roadside buying is strongly discouraged; use only licensed dealers.
How is the local infrastructure?
The roads are often in poor condition, 4WD vehicles are necessary.
Koidu Diamond Mine: where is it located?
Koidu Diamond Mine is located in Sierra Leone.
Koidu Diamond Mine: when is the best time to visit?
The most pleasant time to visit is Jan, Nov, Dec.
Koidu Diamond Mine: why is it worth visiting?
The Koidu Diamond Mine in the Kono District is the premier primary diamond mining operation in Sierra Leone, targeting kimberlite pipes rather than alluvial deposits.
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