G50 Corp's latest metallurgical tests at Golconda confirm low-cost recovery of gallium alongside gold and silver, reinforcing its potential as a strategic domestic supplier of critical minerals.
- Gallium grades doubled through low-cost processing
- Gold and silver recoverable as co-products
- Consistent results across oxide and non-oxide zones
- Proof-of-concept tests support modular processing
- Ongoing studies to refine commercial viability
Gallium Concentration Doubles with Simple Processing
G50 Corp Limited (ASX:G50) has reported encouraging Phase 2 metallurgical test results from surface oxide samples at its Golconda Project in Arizona, demonstrating the potential to double gallium grades using conventional, low-cost mineral processing techniques. The tests showed gallium is strongly concentrated in fine-grained muscovite within the oxidised zone, with gold and silver recoverable as valuable co-products.
Processing Options Yield Flexible Product Streams
The test work, conducted on 10-20 kg sub-samples from a larger 2,200 kg bulk sample, confirmed multiple recovery pathways. G50 can produce either a combined gallium, gold, and silver concentrate or separate mineral concentrates. Screening and desliming upgraded gallium grades by 1.5 to 2 times, recovering up to 87% of the contained gallium. Flotation techniques further concentrated gallium by 2 to 5 times with recoveries between 40-50%, while gold and silver flotation achieved recoveries of 70-90% and 30-50%, respectively.
Consistent Performance Across Material Types
These latest results align closely with April 2026 test work on non-oxide samples, suggesting a common mineral assemblage and processing strategy can be applied across both oxide and non-oxide zones. This consistency supports G50's vision of integrating gallium recovery within a larger precious metals project, enhancing the economic potential of the Golconda deposit.
Strategic Domestic Gallium Supply for Critical Technologies
Gallium is a critical mineral essential for advanced semiconductors, defence systems, and clean energy technologies, with global supply largely tied to aluminium by-products. G50’s Golconda Project offers a potential new domestic source of gallium in the United States, with processing routes designed to be simple, scalable, and modular. This aligns with growing demand from buyers seeking to diversify and secure allied critical minerals supply chains.
Next Steps in Metallurgical and Economic Evaluation
While the test work is preliminary and proof-of-concept in nature, ongoing mineralogy, liberation, and geochemistry studies are underway to better understand the impurity-to-gallium ratios and optimize processing. Further metallurgical testing and drilling may follow to increase sample representativity and evaluate variability across the deposit. These efforts aim to underpin future economic studies assessing the commercial viability of developing Golconda as a strategic gallium and precious metals supply source.
Bottom Line?
G50’s consistent metallurgical results position Golconda as a promising domestic gallium source, but commercial viability hinges on upcoming studies and market dynamics.
Questions in the middle?
- How will ongoing mineralogy and geochemistry studies refine gallium concentrate quality?
- What scale of processing facility would be required to meet US domestic gallium demand?
- Could further flotation optimization significantly improve silver recovery alongside gallium and gold?