Celestite and Strontium Carbonate Supply Chain Crisis Grows as Iran Conflict Escalates - 2026

Celestite (SrSO4) is the primary mineral ore used to produce strontium carbonate, a compound that plays a vital but often overlooked role in modern manufacturing. Strontium carbonate serves as a critical raw material for ceramic ferrite magnets found in electric vehicle motors, wind turbines, home appliances, and industrial equipment. It is also essential for multilayer ceramic capacitors (MLCCs) used in electronics, specialty glass, pyrotechnics, and drilling fluids for oil and gas exploration. The European Union classified strontium as a Critical Raw Material in 2020, recognizing its strategic importance and supply vulnerability. The United States has not mined celestite domestically since 1959 and relies entirely on imports.

The global strontium supply chain entered a period of unprecedented disruption beginning in early 2025, triggered by a rapid succession of events that exposed deep structural vulnerabilities in a market dominated by a handful of producing countries. What began as isolated incidents quickly escalated into a systemic crisis affecting the entire value chain from ore extraction to downstream manufacturing.

The first major shock came on March 6, 2025, when a severe fire broke out at the Kandelium production facility in Garcia, near Monterrey, Mexico. Kandelium operates one of the most competitive strontium carbonate plants in the world, strategically located near the largest celestite deposit on the planet. The fire permanently removed approximately 40,000 tonnes of annual strontium carbonate capacity from the global market. This loss was particularly damaging because roughly 70 percent of the plant's output had been exported to Chinese customers, making it a crucial external supply source for the world's largest strontium consumer. Kandelium also operates plants in Bad Honningen, Germany (the world's largest strontium carbonate facility outside China) and a celestite mine in Escuzar, Spain.

Less than two months later, on April 26, 2025, a catastrophic explosion rocked the Port of Shahid Rajaee in Bandar Abbas, southern Iran. The blast occurred at approximately 08:50 UTC in the Sina container terminal, killing dozens of people and injuring over a thousand. Iranian customs authorities immediately suspended all commercial shipments from the port. This was a direct blow to the global celestite supply chain because Bandar Abbas handles approximately 55 percent of Iran's non-oil cargo and serves as the primary export hub for Iranian celestite ore. Iran holds an estimated 85 percent of the world's high-grade celestite reserves, with ore grades above 85 percent SrSO4, significantly higher than the 35 to 60 percent grades found in Chinese domestic deposits.

China's dependence on Iranian celestite is extreme. In 2025, China imported approximately 99,000 tonnes of celestite, with 60 to 70 percent sourced directly from Iran. China processes this ore into strontium carbonate at domestic refineries, producing roughly 200,000 tonnes per year and controlling an estimated 68 percent of global processing capacity. The explosion at Bandar Abbas effectively severed the primary supply artery for Chinese refineries, triggering an immediate scramble for alternative raw material sources.

Compounding these external shocks, China's domestic strontium carbonate industry was already under severe strain. Hebei Xinji Chemical Group, one of the country's oldest and most prominent chemical manufacturers responsible for nearly 29 percent of national strontium carbonate output, entered bankruptcy reorganization in late 2024. Founded in 1947, the company had been a cornerstone of China's inorganic salts industry for decades. Additionally, in March 2024, Chinese emergency management authorities had ordered the elimination of outdated intermittent carbonization processes at strontium carbonate plants nationwide. This regulatory crackdown forced many smaller facilities into costly technical upgrades or permanent shutdowns, further reducing available capacity during a period of growing supply stress.

The situation escalated dramatically on February 28, 2026, when the U.S.-Iran military conflict intensified with the launch of Operation Epic Fury. Intensive airstrikes targeted Iranian naval and port infrastructure in Bandar Abbas, including the Shahid Rajaee port complex that had only partially recovered from the April 2025 explosion. Iran responded by effectively closing the Strait of Hormuz to commercial shipping. Ship traffic through the strait dropped from roughly 120 transits per day to fewer than six within 72 hours. Major container shipping lines including Maersk, MSC, Hapag-Lloyd, and CMA CGM suspended all Gulf operations. This blockade completely cut off Iranian celestite exports, transforming what had been a tight market into an outright structural deficit.

The price impact has been severe. Chinese domestic strontium carbonate prices surged to 18,000 to 19,000 RMB per tonne by mid-2025, roughly tripling from pre-crisis levels. Analysts warned that prices could exceed 20,000 RMB per tonne as the Strait of Hormuz closure extended into 2026. Since strontium carbonate represents 25 to 40 percent of the raw material cost for ferrite magnets, this price explosion rippled directly into downstream industries. Ferrite magnet prices in China rose by 20 to 35 percent from Q2 2025 onward, with export-oriented producers warning international customers of further price adjustments.

Alternative supply sources have proven insufficient to fill the gap. Spain's Montevive deposit in Andalusia produces high-grade celestite but at limited volumes. Mexican mines in Coahuila and San Luis Potosi continue to operate, but their ore grades and extraction costs are less competitive than Iranian material. More critically, these secondary sources cannot meet the purity and consistency standards required for high-performance strontium ferrite production, making them inadequate substitutes for premium industrial applications. New production capacity from Vishnu Chemicals in Visakhapatnam, India, which commenced commercial strontium carbonate production in August 2025, offers a modest addition but remains far too small to offset the combined loss of Iranian, Mexican (Kandelium), and Chinese (Hebei Xinji) capacity.

The downstream consequences extend across multiple sectors. Electric vehicle manufacturers depend on ferrite magnets for traction motors and auxiliary systems. Wind turbine generators use large ferrite magnet assemblies. Consumer electronics rely on strontium-based ceramic capacitors. The pyrotechnics industry requires strontium nitrate for red-colored signal flares and fireworks. Oil and gas operators use celestite as an additive in drilling fluids. All of these sectors face rising input costs and potential supply interruptions.

A sharp divergence is emerging between market segments. High-end applications serving the EV and renewable energy sectors can absorb higher costs due to strong customer demand and technical barriers to switching. However, low-end and price-sensitive markets for appliance motors, speakers, and industrial equipment face a critical squeeze, with many small and medium enterprises forced to choose between operating at a loss or halting production entirely as raw material inventories deplete.

With no clear timeline for the restoration of Iranian export capacity, the reopening of the Strait of Hormuz, or the rebuild of destroyed production facilities, the global strontium supply chain faces a prolonged period of structural deficit. Strontium cannot be economically recycled from end products, and there is no large-scale recovery infrastructure in place. Substitution options are limited because barium, the closest chemical alternative, degrades performance in ferrite magnets and requires extensive reformulation in other applications. The crisis highlights a critical minerals blind spot that received far too little attention before the supply chain collapsed.