Finniss Lithium Operation Restart Signals Australian Spodumene Supply Return

Core Lithium

Finniss Lithium Operation is returning to production after Core Lithium restarted mining at the Grants open pit in Australia’s Northern Territory. The move marks the reopening of an asset that had been in care and maintenance since 2024 because of weak lithium prices.

Finniss Lithium Operation will process its first ore in the September quarter, with the first spodumene concentrate shipment expected in the December quarter. Additional shipments are planned for 2027.

Finniss Lithium Operation restart reflects the sharp recovery in spodumene prices after supply constraints emerged in late 2025. Core Lithium approved the restart in March as stronger pricing improved the economics of bringing idled capacity back online.

The Grants pit will provide access to around 800,000t of ore and deliver about 100,000t of spodumene concentrate on a 5% lithium oxide basis. Mining has started in line with Core Lithium’s final investment decision schedule and cost expectations.

Grants Pit Brings Near-Term Spodumene Back to Market

The Grants open pit gives Core Lithium a near-term route back into the seaborne spodumene market. First ore processing in the September quarter and first shipment in the December quarter create a clear restart timeline.

This matters because Australian lithium producers are beginning to respond to stronger market conditions. Several operations that were halted during the downturn are now restarting as prices recover.

Spodumene prices have rebounded sharply from the lows reached in December 2025. The recovery has made previously idled hard-rock assets more attractive, especially those with existing infrastructure and established development plans.

For buyers, the return of Finniss adds incremental Australian supply at a time when lithium converters are reassessing feedstock security. But the restart also adds new supply into a market still vulnerable to oversupply if too many projects return at once.

Core Lithium’s timing is therefore important. The company is moving before the next wave of supply fully arrives, but it must still prove stable mining, processing and shipment performance after a long shutdown.

BP33 Sets Up Longer-Term Finniss Expansion

Core Lithium is also advancing infrastructure work at the BP33 underground mine. The company awarded a A$274mn underground mining services contract to Develop Global for a three-to-five-year period.

BP33 is expected to be developed by mid-2027. It should help lift ore production at Finniss to 1.2mn t/yr by mid-2028.

Core Lithium’s final investment decision summary outlines a longer-term plan to produce spodumene concentrate over a 20-year mine life. Expected unit costs are around A$762/t, giving the operation leverage to higher spodumene pricing if execution stays on track.

The restart and BP33 development show how lithium producers are rebuilding confidence after the 2024-25 market downturn. The key difference now is that investors and customers will focus more closely on cost discipline, grade, logistics and customer commitments.

For the broader battery supply chain, Finniss adds another signal that Australian spodumene remains central to global lithium raw material supply. The market recovery is bringing supply back, but long-term balance will depend on whether battery demand can absorb returning and new production.

The Metalnomist Commentary

Core Lithium’s restart shows that the lithium cycle has turned enough to bring idled Australian mines back into action. The risk is that recovering prices invite too much supply too quickly, making cost discipline and offtake quality more important than restart headlines.