Fluorspar Substitutes: Alternatives and Trade-offs
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Fluorspar can be replaced in some applications and not in others. For production of aluminum fluoride and HF, USGS names fluorosilicic acid (FSA). It names substitutes for 2 applications in all, and the table below gives its wording for each, including where a substitute costs performance or does not exist.
$470/t
acid grade, average unit value of imports (cost, insurance, freight) in 2025 (+1% on 2024)
What is fluorspar used for?
- Anhydrous hydrogen fluoride (HF): by far the leading use of acid-grade fluorspar; HF is the feedstock for virtually all fluorine-bearing chemicals, such as refrigerants and fluoropolymers
- Metals processing chemicals: chemicals used in the processing of primary aluminum and uranium
- Semiconductors and petrochemicals: HF is essential in cleaning and etching during semiconductor manufacturing and serves as a petrochemical catalyst
- Metallurgical-grade uses: flux in steelmaking and iron and steel casting, plus cement, enamels, glass and welding rod coatings
Which materials can replace fluorspar?
| Application | Substitute and trade-off |
|---|---|
| Production of aluminum fluoride and HF | Fluorosilicic acid (FSA) |
| Fluxes | Aluminum smelting dross, borax, calcium chloride, iron oxides, manganese ore, silica sand and titanium dioxide |
Source: USGS Mineral Commodity Summaries 2026, Fluorspar. USGS says substitutes often cost performance or money; the table gives its wording for each application.
Frequently asked questions
What can replace fluorspar?
Production of aluminum fluoride and HF: fluorosilicic acid (FSA); Fluxes: aluminum smelting dross, borax, calcium chloride, iron oxides, manganese ore, silica sand and titanium dioxide.
What is fluorspar used for?
Fluorspar is used in anhydrous hydrogen fluoride (HF), metals processing chemicals and semiconductors and petrochemicals. Anhydrous hydrogen fluoride (HF): by far the leading use of acid-grade fluorspar; HF is the feedstock for virtually all fluorine-bearing chemicals, such as refrigerants and fluoropolymers.
Can fluorspar be recycled?
Synthetic fluorspar may be made from waste neutralized in uranium enrichment, petroleum alkylation and stainless-steel pickling, but impurities limit its use. Primary aluminum producers recycle HF and fluorides from smelting.
Is fluorspar a critical mineral?
Yes. Fluorspar is on all four official critical minerals lists: the US, EU, Australian and Canadian. Fluorspar was already on the 2022 US list and stays on the final 2025 list of 60 minerals. US net import reliance for fluorspar in 2025 was 100%.
Sources
Read on October 13, 2026. Figures on this page come from these documents; where a number is an estimate, the source says so.
- USGS Mineral Commodity Summaries 2026: Fluorspar. Production, reserves, uses, substitutes, recycling and events
- USGS Mineral Commodity Summaries 2026: introduction (Table 7 and Figures 10A and 10B). Net import reliance, leading producer and price changes for critical minerals
- Federal Register: Final 2025 List of Critical Minerals
- EUR-Lex: Regulation (EU) 2024/1252
- Department of Industry, Science and Resources: Australia’s Critical Minerals List and Strategic Materials List
- Government of Canada: Canada’s critical minerals
- Orbia: investor presentation (September 2025)
- Ares Strategic Mining: Form F-10/A (2026)
- Government of Newfoundland and Labrador: sale of Canada Fluorspar (13 June 2023)
Related topics
Fluorspar: full profile
Uses, producers, price, substitutes and critical list status for fluorspar.
China profile
Production, policy and projects in China.
Critical Minerals Lists Compared
The US, EU, Australian and Canadian lists side by side.
Barite
Profile of barite.
Boron
Profile of boron.
Phosphate
Profile of phosphate.
