Rhyolite Ridge Project

Advancing the Rhyolite Ridge Lithium-Boron Project in Nevada.

Rhyolite Ridge is one of two advanced lithium projects in the U.S. and is fully funded to a Final Investment Decision. Once operational, Rhyolite Ridge is expected to be a low-cost lithium site, due to the valuable boron co-product and innovative cost saving measures embedded in our sustainably designed operations.

Over the course of its lifetime, modelled on a 26-year production, Rhyolite Ridge will help power upward of 50 million electric vehicles.

Because our operations will be on-site and our materials will not be shipped to a separate processing facility, Ioneer can more quickly and efficiently produce lithium carbonate, critical for the EV battery supply chain.


  • Located in Esmeralda County, the most sparsely populated county in Nevada
  • Accessible to the state’s Lithium Loop and located between Las Vegas and Reno
  • On federal (Bureau of Land Management) land in the Silver Peak Range at approximately 1,800m altitude

Advancement Highlights

Our Partner

Ioneer is extremely pleased to have Sibanye-Stillwater, a leading international mining company, as a strategic partner in our Rhyolite Ridge Project. Sibanye-Stillwater is one of the world’s largest primary producers of platinum, palladium and rhodium, and is also a top tier gold producer, ranking third globally on a gold equivalent basis.

Sibanye-Stillwater is an excellent partner for Ioneer to jointly realize the promise of Rhyolite Ridge because of the Company’s:

  • Proven track record of developing and operating major mining projects including three integrated facilities in Montana;
  • Commitment to developing and maintaining an inclusive and sustainable culture; and
  • Determination to become a major force in the electric battery materials supply chain.

Sibanye-Stillwater is listed on the New York Stock Exchange and Johannesburg Stock Exchange.

  • This field is for validation purposes and should be left unchanged.