OD6 Metals Unveils Ultra-High-Grade Fluorspar up to 82% CaF2 at Horseshoe Prospect

Ultra-High-Grade Fluorspar Grades Confirmed at Horseshoe

OD6 Metals (ASX:OD6) has delivered a striking upgrade to its fluorspar credentials with channel sampling at the Horseshoe Prospect in Nevada returning grades as high as 82% CaF2. Continuous intercepts include 12 metres averaging 68.9% CaF2, 7 metres at 73.1%, and a 2-metre section at 75% CaF2, all well above typical commercial thresholds. These results not only eclipse the high-grade assays recently reported at the nearby Mammoth Prospect but also validate historical production grades from the site.

Broad Mineralised System with Significant Upside

The Horseshoe Prospect hosts a breccia/replacement style fluorspar system spanning roughly 3,000 square metres, with geological evidence suggesting mineralisation extends well beyond the sampled outcrops. The company notes that only a portion of the mapped system has been tested to date, with mineralisation remaining open along strike and at depth beneath silicified caps. This expansive footprint hints at a potentially larger resource base, a prospect that gains weight considering the historic small-scale mining of approximately 26,000 tonnes in the 1950s and 60s.

These findings complement the earlier continuous high-grade fluorspar results from the Mammoth Prospect, where OD6 reported 12 metres at 40.8% CaF2, reinforcing the district-scale potential of the Quinn Fluorspar Project. Together, these discoveries position OD6 as a promising player in the US critical minerals space, particularly as the country remains entirely reliant on imports for fluorspar.

Commercial Potential and Strategic Implications

Fluorspar grades above 70% CaF2 support the prospect of direct shipping ore (DSO) as Metspar, a more cost-effective route to market. Additionally, the material offers a clear pathway to upgrading to AcidSpar quality (>97% CaF2), which is highly sought after for advanced industrial applications including semiconductor etching, battery technologies, and nuclear fuel processing. Managing Director Brett Hazelden emphasised the commercial significance, noting the potential for accelerated permitting under the US Fast 41 Status and early mining operations with expansion capabilities.

The project’s location in Nevada, a top-ranked mining jurisdiction, and proximity to the US Strategic Minerals Reserve at Hawthorne further enhance its strategic value. This is notable given the USGS’s classification of fluorspar as a critical mineral and the global supply concentration in China, which supplies 68% of the world’s fluorspar.

Next Steps in Exploration and Development

OD6 is gearing up to expand its systematic channel and rock chip sampling across untested zones at Horseshoe, refine geological models, and identify drill targets. Permitting efforts for maiden drilling are underway alongside planning for bulk metallurgical testwork to validate processing pathways. The company’s approach reflects a methodical due diligence process following its March 2026 option agreement to acquire the Quinn Fluorspar Project.

With only preliminary sampling completed so far, the true scale and economic viability of the mineralisation remain to be fully defined. The upcoming drilling campaigns and metallurgical studies will be critical in shaping the project’s trajectory and potential market impact.