Sibanye exits Rhyolite Ridge lithium project on weak prices

Sibanye walks away from Rhyolite Ridge lithium project on weak prices

Cecilia Jamasmie | February 26, 2025 | 3:50 am Battery Metals Critical Minerals News Africa Australia Boron Lithium

The Rhyolite Ridge lithium-boron deposit in Nevada. (Image courtesy of )

South African precious metals miner Sibanye-Stillwater (JSE: SSW)(NYSE: SBSW) has in the Rhyolite Ridge lithium-boron project in the US state of Nevada, due in part to weak prices.

In 2021, Sibanye reached an agreement with Australia’s ioneer Ltd (ASX: INR) to form a joint venture for the project. The Johannesburg-based company was set to invest $490 million for a 50% stake, contingent on various conditions, including a final investment decision by its board.

After reviewing updated studies on the planned mine, Sibanye-Stillwater opted against further investment, stating the project “did not meet the Sibanye-Stillwater investment hurdle rates at prudent pricing assumptions.” The company did not provide additional details.

Shares in ioneer lost 2.7% of their value in early trading in Australia, but pared losses to close down 1.9% at A$4.07. This leaves the company with a market capitalization of A$344 million ($217 million).

Rhyolite Ridge has been touted as a critical part of US efforts to strengthen domestic supplies of key minerals and reduce reliance on China. But lithium prices have tumbled from a 2022 peak, deterring some investments.

Despite withdrawing from the project, Sibanye-Stillwater reaffirmed its commitment to the US market and its battery metals strategy, stating it would continue evaluating growth opportunities in the sector.

Loan is safe

In a , ioneer said it was “pleased to have this pending matter resolved”, as it allowed it to move forward with a final investment decision for the fully permitted project.

The lithium developer emphasized that Sibanye’s withdrawal would not affect a $996 million loan secured from the US Department of Energy, provided that conditions precedent are met.

Rhyolite Ridge, expected to operate for 22 years, is projected to produce 22,000 tonnes of lithium carbonate annually— enough to power 370,000 electric vehicles.

It will also yield 170,000 tonnes of boric acid, derived from boron, a key material used in construction, medicine, and agriculture. Boron sales are expected to contribute 30% to 40% of the mine’s total revenue, providing a buffer against lithium market volatility, according to ioneer.