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Merelani Tanzanite Mine
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The Merelani Tanzanite Mines, located in the Simanjiro District of the Manyara Region, are the only place on Earth where the rare gemstone tanzanite is found. The mining area is divided into several blocks (A through D), with Block C being the most productive area for industrial-scale extraction. Geologically, tanzanite was formed approximately 585 million years ago through metamorphic processes at the foothills of Mount Kilimanjaro. To curb illegal trade and smuggling, the Tanzanian government erected a 24-kilometer-long perimeter wall around the entire mining site in 2018. Mining is conducted under challenging conditions in deep vertical shafts that often extend several hundred meters underground. Tanzanite is celebrated for its striking pleochroism, displaying blue, violet, and burgundy hues depending on the viewing angle. The mines are a vital source of income for the local population and contribute significantly to Tanzania's prestige in the international gemstone market.
- Location: Tanzania
- Nearby: Usa River (25 km)
Best time to visit & climate
The most pleasant time to visit is Jul–Sep.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg °C | 24 | 24 | 23 | 22 | 20 | 19 | 19 | 20 | 22 | 23 | 23 | 23 |
| Rain mm | 88 | 73 | 105 | 147 | 90 | 18 | 9 | 14 | 17 | 66 | 133 | 110 |
📋 Practical info
What is this place?
Merelani Tanzanite Mine is the world's only mine producing the rare blue gemstone tanzanite, located at the foothills of Mount Kilimanjaro. It is of great significance to Tanzania's gemstone industry.
Visiting
The mine is not open to the public, but there are nearby gemstone markets where tanzanite is sold. Occasionally guided tours are offered for visitors.
Where to view it
A good viewpoint is the road between Arusha and Moshi, offering views of the mine site and Mount Kilimanjaro. The surrounding hills provide a broad view of the extraction areas.
Local products
The main product is tanzanite, a rare blue gemstone available in various qualities and cuts. Other gemstones and handicrafts are also sold in markets in Arusha and Moshi.
Active season
Mining occurs year-round, with higher activity during the dry season from June to October. The tourist season for gemstone purchases runs from July to September and December to February.
Nearby
A visit to Merelani Mine can be combined with a Kilimanjaro climb or a safari in Arusha National Park. The city of Arusha has rich cultural offerings and gemstone markets.
Geography
Facts
- Tanzanite is 1,000 times rarer than diamonds and occurs only in this location.
- A 24-kilometer perimeter wall around the mines was completed in 2018.
- The largest rough tanzanite ever found weighed over 9 kilograms.
- The mines are situated in the Lelatema Hills near the city of Arusha.
- Block C is operated on a large scale by the firm TanzaniteOne.
- The gemstone was only officially discovered and named in 1967.
Explore nearby
Notable places around
Route planner — Car & Motorhome
Where do you start? We build the route here, with stops and country notes along the way.
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Sights nearby
Frequently asked questions
What is special about the Merelani mine?
It is the world's only known source of tanzanite, a rare and valuable gemstone.
Is tanzanite cheaper here?
Although it is the place of origin, prices are subject to international market standards and certifications.
Can you visit the mine?
Official guided tours are rare and require special permission; the area is more industrial in nature.
Where can one safely buy tanzanite?
Buy tanzanite only in reputable jewelry stores with official origin certificates in Arusha or larger cities.
When is the best time to travel?
The region around Arusha can be visited all year round, with the dry seasons (June, October) being the most pleasant.
Merelani Tanzanite Mine: where is it located?
Merelani Tanzanite Mine is located in Tanzania.
Merelani Tanzanite Mine: when is the best time to visit?
The most pleasant time to visit is Jul, Sep.
Merelani Tanzanite Mine: why is it worth visiting?
The Merelani Tanzanite Mines, located in the Simanjiro District of the Manyara Region, are the only place on Earth where the rare gemstone tanzanite is found.
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