Our Projects
Four active mines across Tanzania, and the sites that shaped us.
From our flagship Spinel pits in Mahenge to our newest Tanzanite venture in Mererani, every site is run on responsible extraction and community investment.
Current Projects
What we operate today
| Project | Location | Mineral | Method | Active since |
|---|---|---|---|---|
| Mahenge (Epanko) | Ulanga District, Morogoro | Spinel | Open-cast | 2014Flagship & HQ |
| Lemshuku | Arusha | Tsavorite | Underground | 2024 |
| Kilindi | Kwamfyomi Village, Tanga | Ruby | Open-cast | 2025 |
| Mererani | Manyara | Tanzanite | Underground | 2026Newest |
OUR NEWEST VENTURE · 2026
Mererani, Manyara — Tanzanite
Mererani is the only place on Earth where Tanzanite is found, and in 2026 Ruby International became part of its story. Our entry into this celebrated gemstone marks the most significant milestone in our growth since Mahenge itself.
Mererani is worked through underground mining, a reflection of how the deposit sits in the ground and of the specialized care this gemstone demands. As at every site, our approach is anchored in responsible extraction, strict compliance with Tanzania’s gemstone mining regulations, and investment in the surrounding community.
SpinelOpen-castFlagship & HQ
Mahenge (Epanko)
Where Ruby International began in 2014 and our headquarters today. Five operational open-cast pits producing the world-renowned Mahenge Spinel.
TsavoriteUndergroundSince 2024
Lemshuku, Arusha
Ten prime underground extraction pits close to our Arusha trade office, producing Tsavorite prized for its vivid green depth and durability.
RubyOpen-castSince 2025
Kilindi, Tanga
In Kwamfyomi Village, the company that has carried the name ‘Ruby’ since its founding now mines the stone itself, connected directly to our Arusha and Dar es Salaam trade offices.
Past Projects
Our Journey
Not every site we have worked at remains part of our active portfolio, but each left its mark on the company we are today. From seasonal operations in Ruvuma to an early venture across the Kenyan border, these are the sites that shaped our judgment, our discipline, and the values that now guide every mine we operate.
2017 – 2022
Tunduru, Ruvuma
Sapphire (blue & yellow) · Alexandrite · Green Tourmaline
Our seasonal Tunduru and Muhuhesi operation taught us to work with patience and precision across a short, unforgiving three-to-four-month dry season each year, when the ground itself dictated our calendar.
2017 – 2022
Voi, Kenya
Tsavorite
An early-stage Tsavorite investment that pushed our reach beyond Tanzania’s borders for the first time and sharpened our understanding of the wider East African gemstone trade.
2023 – 2025
Mwakijembe, Tanga
Tourmaline
An initial Tourmaline venture that proved out a district we would return to just a season later — this time in Kilindi District, in pursuit of Ruby.
2024 – 2026
Songea, Ruvuma
Another chapter of the same restless curiosity — an appetite for good ground, wherever it could be found responsibly.
We remain grateful to every community that hosted us at these sites, however briefly.
Trade with Ruby International
Reach our trade offices in Arusha and Dar es Salaam.