G50 Corp Limited reports encouraging metallurgical test results from its Golconda Project in Arizona, demonstrating the ability to concentrate gallium using established, cost-effective processing techniques. The findings support the potential for a strategic domestic gallium supply integrated with precious metals production.
- Gallium grades increased by 150-200% from feedstock to bulk concentrate
- Gallium recovery rates reached up to 70% through screening and flotation
- Silver and gold recoveries were also strong, up to 97% and 82% respectively
- Test work used proven, low-cost mineral processing methods including crushing, screening, and flotation
- Results support potential development of a US domestic gallium supply chain
Metallurgical Test Work Advances Gallium Opportunity
G50 Corp Limited (ASX:G50) has released positive preliminary metallurgical test results from its 100%-owned Golconda Project in Arizona, highlighting the potential to concentrate gallium using established, low-cost processing methods. The test work, conducted by SGS Lakefield in Canada, demonstrated that gallium grades increased between 150% and 200% from the initial feedstock to the bulk concentrate, with recoveries reaching up to 70% through screening and flotation processes.
In addition to gallium, the test work showed strong recoveries of silver and gold, with silver recovery rates up to 97% and gold up to 82%. These results indicate that the Golconda Project could support an integrated production of both critical and precious metals, potentially enhancing the project's strategic value.
Strategic Importance of Gallium for Domestic Supply
Gallium is a critical mineral used in advanced semiconductors, defence systems, and clean-energy technologies. Currently, global gallium supply is largely a by-product of aluminium and zinc processing, which limits supply transparency and flexibility. The Golconda test work suggests that gallium can be recovered as a standalone concentrate, which could contribute to establishing a strategic domestic supply source in the United States.
The processing routes identified are simple, scalable, and modular, aligning with the needs of a domestic market actively seeking to diversify and secure critical minerals supply chains. This aligns with broader industry and governmental interest in reducing reliance on foreign sources for strategic minerals.
Mineralogical Insights and Processing Approach
Previous mineralogical studies at Golconda revealed that approximately 90% of the gallium is hosted within sericite, a type of muscovite, which is separate from precious metal-bearing sulfides. This separation is considered advantageous for concentration and extraction using conventional mineral processing techniques.
The recent metallurgical test work confirmed that gallium preferentially reports to fine particle size fractions. The processing flowsheet developed as a conceptual guide involves crushing, screening, desliming, and flotation to produce separate concentrates for gallium and precious metals. While preliminary, this flowsheet provides a technical foundation for further test work and evaluation.
Context Within Ongoing Exploration and Development
The Golconda Project has been subject to extensive drilling since 2023, including both reverse circulation and core drilling, which has identified broad zones of gallium mineralisation associated with gold, silver, and base metals. These recent metallurgical results build on earlier mineralogical breakthroughs reported in 2025 and support the project's potential as a source of both critical and precious metals.
This announcement follows G50 Corp's recent advancement of drilling activities at Golconda amid rising gallium and precious metals prices, as detailed in their January 2026 update. The company’s efforts to expand exploration and refine processing methods underscore the strategic importance of the project within the US critical minerals landscape.
Cautionary Notes and Next Steps
G50 Corp emphasises that the metallurgical test work results are preliminary and based on limited samples. They do not constitute a Mineral Resource or Ore Reserve under the JORC Code (2012). Further metallurgical testing, geological evaluation, and economic studies are required to determine the technical and commercial viability of any future development.
Future work will focus on increasing sample representativity, testing variability across the deposit, and optimising processing methods. Additional drilling and sampling may also be undertaken based on ongoing project studies.
Bottom Line?
While promising, the gallium concentration results remain preliminary and require further validation to assess commercial viability within a strategic domestic supply framework.
Questions in the middle?
- How will further metallurgical testing refine gallium recovery rates and processing costs?
- What economic studies are planned to evaluate the commercial feasibility of gallium production at Golconda?
- How might evolving US critical minerals policies impact the development timeline and market demand for Golconda's gallium?