Gemstone Mining in Tanzania: What I Learned in the Field

Tanzania has played an important part in my development as a gemmologist. Spending time in gemstone-producing regions, meeting miners, traders and cutters, and seeing first-hand how gemstones move from the ground into the market has given me an understanding that cannot be gained from textbooks alone.

Updated August 2026: This article was originally written when I was involved in organised gemstone tours in Tanzania. My work has since evolved, and I now focus on my own private Gemstone Experiences in Sri Lanka. I have updated this article to share what my time in Tanzania taught me about gemstones, mining and the people behind the trade.

What Gemstone Mining in Tanzania Really Looks Like

Visiting gemstone-producing areas in Tanzania brought the realities of mining into sharp focus. Gemstones do not simply appear neatly presented on a dealer’s table. Behind each stone is geology, physical labour, uncertainty and often a remarkable amount of persistence. Being in the field allowed me to see the conditions in which gemstones are discovered and to better understand the journey they make before reaching the international market.

Learning From Tanzania’s Gemstone Trade

One of the most valuable parts of my time in Tanzania has been meeting the people who work within the gemstone trade itself. Miners, traders and cutters each see a gemstone from a different perspective, and those conversations have helped deepen my understanding of value, quality, provenance and the practical realities of buying gemstones at source.

Tanzania’s Remarkable Gemstone Diversity

Tanzania is one of the world’s most fascinating coloured gemstone-producing countries. Rubies, sapphires, garnets, tourmalines and spinels are all found here, alongside tanzanite, the gemstone found only in the Merelani region of Tanzania. Seeing rough material closer to its source has helped me understand just how much knowledge is required to assess a gemstone before it ever reaches a cutting wheel or jewellery workshop.

The People Behind Tanzania’s Gemstones

One of the most important lessons from visiting mining communities is that gemstones are never just about the stones themselves. Behind every discovery are people; miners, sorters, brokers, traders and cutters, whose knowledge and livelihoods are closely connected to the gem trade. Meeting them gave me a much deeper appreciation of the human story behind the gemstones we eventually see in jewellery.

What Tanzania Taught Me as a Gemmologist

My experiences in Tanzania reinforced something I have come to believe very strongly: understanding gemstones means understanding far more than their colour, clarity and carat weight. You need to understand where they come from, how they are mined, how they enter the trade and the people whose knowledge sits behind them. That field experience continues to shape the way I assess gemstones and advise buyers today.

Experience the Gemstone Trade in Sri Lanka

Today, I bring that field experience into my own private Gemstone Experiences in Sri Lanka. Designed for individuals and couples, these are personal, flexible journeys into the world of gemstones; from mines and markets to cutters, traders and the people behind the stones.

Kim Rix GG GIA

Gemstone Detective