How to Evaluate Acid-Grade Fluorspar Projects in Australia

Australia holds economic demonstrated resources of 343 kt of fluorine, ranking ninth in the world. It also operates zero fluorine mines, holds zero ore reserves, and produces exactly nothing.

That is not a rounding error. It is a structural gap, and it sits at the heart of one of the most strategically sensitive minerals in modern industry.

Fluorine landed on Australia’s Critical Minerals List on 16 December 2023, joining a roster of commodities the government considers vital to the economy and national security. Since 2019, roughly $6.6 billion has been committed across critical mineral strategies, yet the fluorine number has stayed at zero throughout.

Understanding whether that changes means understanding acid-grade fluorspar, the specific chemical product that unlocks fluorine’s value. This piece gives you the framework to read domestic exploration projects properly, covering the chemical threshold, the geopolitical squeeze, and the operational gauntlet that separates a good drill result from a working mine.

Why the acid-grade threshold defines commercial viability

Start with the rock. Fluorspar is the commercial name for the mineral fluorite, calcium fluoride (CaF₂), and it comes out of the ground in wildly varying purity. What determines its worth is not simply how much fluorite is present, but how clean it can be made.

Fluorspar sorts into three commercial tiers. Ceramic grade sits at 85-97% CaF₂. Metallurgical grade caps at roughly 97% CaF₂ and feeds steelmaking. Acid grade, the prize, requires more than 97.5% CaF₂, with silica (SiO₂) held below 1.5% and iron oxide (Fe₂O₃) below 0.5%.

Those impurity limits are the whole game. Acid grade, sometimes called acidspar, is the feedstock for hydrofluoric acid (HF), the gateway chemical from which nearly every fluorine compound descends. HF production alone accounts for approximately 40% of annual global fluorspar consumption.

Here is why that matters to you as an investor. A deposit only holds serious commercial value if the ore can be economically purified to meet those tolerances. Miss the threshold and the material is stranded in low-value metallurgical markets.

The applications on the other side of HF explain the strategic weight. Acid-grade fluorspar feeds:

• Aluminium fluoride (AlF₃), used in aluminium smelting
• Uranium hexafluoride (UF₆), the feedstock for nuclear fuel enrichment
• Lithium hexafluorophosphate (LiPF₆), the electrolyte salt in lithium-ion EV batteries
• Fluoropolymers and fluorinated refrigerants, used in coatings, cooling and advanced industrial systems
• Semiconductor etching, where HF cleans and shapes integrated circuits

No satisfactory economic substitute exists for many of these uses. That is what anchors acid-grade demand across both traditional industry and the energy transition.

Fluorspar demand in battery storage and AI data centre cooling systems has added a new layer to the structural demand case, with LiPF₆ electrolyte requirements and fluorinated heat-transfer fluids both tracing directly back to acid-grade supply.

The metallurgical purification challenge

Getting from raw ore to acid-grade concentrate is where many projects quietly fail. The process demands fine grinding and complex flotation circuits, chemical separation baths that coax fluorite away from silica and iron until the concentrate clears the specification.

The ore itself has to cooperate. Deleterious elements such as arsenic and heavy metals can complicate processing or make the material unusable for HF plants outright.

Calcite is another silent killer. High carbonate content interferes with the upgrading process, and a deposit that looks superb on grade can prove commercially unviable once these impurities surface in testwork. This is why headline drill grades tell you only part of the story.

China’s supply chain grip and the 2026 export reality

Now shift the lens from Australia’s potential to the global reality, because the market you would be entering is one of the most concentrated in the entire minerals sector.

World mine production reached roughly 10 million tonnes in 2025, and China accounts for 56-60% of it. Mexico and Mongolia follow at approximately 14.7% each, with South Africa near 4.0%. The top three producers together supply close to 88% of global output.

That concentration carries a formal risk score. The Herfindahl-Hirschman Index (HHI), a standard measure of market concentration where higher numbers signal fewer dominant players, registered 0.40 for fluorspar in 2025. Anything above 0.25 is generally treated as highly concentrated.

The deeper story is what China did with its position. According to strategic analysis from ModelDiplomat, China spent roughly a decade building an integrated fluorine chemical industry and now consumes most of its own acid-grade supply internally, turning it into HF, fluorocarbons and fluoropolymers rather than shipping raw ore abroad.

That transformation, from raw exporter to chemical superpower, is why analysts increasingly frame fluorspar as a potential economic lever comparable to rare earths.

Then came the policy move. A Chinese export licensing regime introduced in 2026 directly affects more than half of world supply, and non-Chinese suppliers have already responded by raising quoted term prices and extending contract tenors.

The Chinese export control framework for critical minerals draws on a legislative architecture built over several years, and the fluorspar licensing regime introduced in 2026 follows the same structural logic that China applied to rare earths, tungsten, and gallium in earlier rounds.

The 2026 licensing regime is the moment sovereign fluorspar supply stopped being a policy talking point and became an industrial necessity. When controls touch more than half of world supply and rival producers immediately harden their pricing, allied nations lose the option of waiting.

What this tells you is that the macro tailwind for non-Chinese projects is real and strengthening. The pressure to find secure supply outside Asia is now a funding driver, not just a strategy document.

Decoding Tivan’s early geochemical results at Sandover

This is where theory meets an actual Australian drill program. Tivan Limited acquired the Sandover Fluorite Project in the Northern Territory in early 2025, and it has become one of the more visible attempts to close the country’s fluorine gap.

The early numbers are genuinely encouraging. Surface sampling reported in March 2025 returned assays up to 94% CaF₂. Stage One diamond drilling that followed produced a highest intersection of 3.4 metres at 71.7% CaF₂.

Tivan’s ultra high-grade fluorite discovery at surface has drawn attention to the Northern Territory’s prospectivity precisely because vein-hosted fluorite systems with low deleterious element counts are uncommon in the geological record at grades approaching 94% CaF2.

Stage Two scaled things up considerably. Across 58 reverse-circulation (RC) holes for 5,884 metres, every single hole hit fluorite mineralisation, with a peak intercept of 3 metres at 74.3% CaF₂.

The most important result is arguably the least eye-catching. A preliminary geochemical assessment reported on 1 September 2026 returned low concentrations of arsenic and phosphorus, with virtually no calcite recorded across the five reefs tested.

Recall the purification challenge from earlier. Those are precisely the impurities that ruin fluorspar projects, so their apparent absence tells you Sandover clears an early hurdle that sinks many deposits.

Now the cold part. As of September 2026, Tivan has published no JORC-compliant mineral resource estimate and no scoping, pre-feasibility or feasibility study. A JORC resource is a formally classified estimate of tonnage and grade with reasonable prospects for economic extraction; without one, the project’s size and economics remain unquantified in any public document.

JORC resource classification underpins every tonnage and grade estimate that ASX-listed miners publish, providing investors with a standardised framework to assess what a company has actually proven in the ground versus what remains speculative.

You must weigh the favourable geochemistry against everything still undemonstrated. High grades over short intervals and clean chemistry reduce specific risks, but they do not prove an economic orebody or a working flowsheet.

The common ways early fluorspar projects fail are worth holding in mind:

• Promising intercepts that prove discontinuous or lower grade once grid-drilled
• Ore that turns out too refractory or costly to upgrade to acid grade at scale
• Deleterious elements that emerge at higher levels in detailed metallurgical testwork
• Environmental or community constraints on HF and fluorochemical plants
• Inability to secure long-term offtake against entrenched Chinese and Mexican supply

The pathway from drill core to chemical plant

The milestones ahead at Sandover are specific and sequential. Bench and pilot-scale metallurgical testwork must confirm grind size, reagent schemes, recoveries and concentrate quality across the ore types intersected. A JORC resource must then establish tonnage and grade continuity, followed by scoping and feasibility studies to translate geology into economics.

Beyond that sits the hardest part. Building HF infrastructure in a remote region carries capital intensity and environmental permitting complexity well above a standalone concentrator, and offtake integration into a China-dominated supply chain remains an open question.

Bridging the gap between policy and production

The tension running through all of this is simple to state and hard to resolve. Australia’s policy framework now treats fluorine as strategic, backed by a dedicated national strategy, a production tax incentive that names fluorine explicitly, and billions in committed funding. The production figure, however, remains zero.

Closing that gap requires more than high-grade rock. It requires resource definition, proven metallurgy, feasibility studies, project financing, capital-intensive processing plants and integration into global supply chains, a sequence measured in years rather than quarters.

This is why partnerships matter more than drill grades at this stage. Tivan’s July 2025 development agreement with Sumitomo, a major Japanese trading house, is arguably the strongest leading indicator of the project’s seriousness, because allied industrial buyers are precisely who a non-Chinese producer needs.

Over the next 24 months, expect China’s tightening export controls to keep pressure on allied nations, sharpening the case for sovereign supply while raising the bar for new entrants competing against an incumbent with structural advantages across the whole value chain.

This article is for informational purposes only and should not be considered financial advice. Investors should conduct their own research and consult with financial professionals before making investment decisions. Financial projections and forward-looking statements are speculative, subject to change based on market and company developments, and past performance does not guarantee future results.