Simanjiro. Small-scale miners operating in the Lemshuku area of Simanjiro District have issued a formal appeal to the government to conduct comprehensive geological research into local Green Garnet deposits.
The miners are requesting expert intervention to determine the exact volume, quality, and market value of the gemstones found within their mining concessions.
Green Garnet, most notably the variety known as Tsavorite, is one of the world’s most sought-after gemstones, often surpassing emeralds in brilliance and durability.
Geologically, these stones are part of the grossular garnet group and owe their vivid green hue to the presence of trace amounts of vanadium or chromium.
The deposits in the Manyara Region are part of the Neoproterozoic Mozambique Belt, a geological formation famous for its rich gemstone diversity.
Unlike many other gems, Tsavorite is rarely treated with heat or oil, making its natural clarity and “neon” green saturation highly valuable on the London and New York markets.
However, because these gems are often found in “pockets” within metamorphic rock, locating them without advanced geophysical equipment is notoriously difficult and labour-intensive.
Challenges of ‘blind’ mining
Speaking on December 16, 2025, during a visit by the Madini Diary team, the chairman of the Manyara Regional Miners Association (MAREMA) for Lemshuku, Swalehe Abdalah, highlighted the difficulties faced by local operators.
He explained that for years, miners have relied on traditional methods and intuition rather than scientific data.
This lack of professional insight has left them unable to identify high-yield areas or understand the true global market value of their yields.
He noted that they have been mining without the help of professional research, which makes it impossible to identify areas with high mineral concentrations or get accurate information regarding the value of these gems in domestic and international markets.
The need for modern geoscience
Echoing these sentiments director of Perfect Company, Godson Shoo, noted that miners have spent over a decade working blindly.
He emphasized that the absence of expert guidance leads to wasted resources, as significant time and money are spent digging in unproductive areas.
Furthermore, the lack of geological mapping affects structural stability and workplace safety, while inefficient mining methods lead to unnecessary land degradation.
Shoo stressed that a professional survey of the Green Garnet deposits would clarify the depth and scale of the resources, allowing for more sustainable and profitable operations.
A primary concern raised by the mining community is the financial loss incurred due to a lack of market transparency.
Without official data on mineral quality, many miners are forced to sell their stones to middlemen at substantially lower prices.
Shoo concluded that if research is conducted, it will enable them to engage in productive mining, increase their income, and contribute more effectively to the development of the communities surrounding these mines.
