Flagship project · Washington State, USA
Magnesium Project
Element One's Magnesium Project in Washington State is being advanced as a potential source of secure, traceable and lower-carbon magnesium for North American industries. The project is at the testwork stage. No mineral resource or reserve has been established.
At a glance
26.39–28.46%
Magnesium across eight initial samples, reported September 22, 2026
2,660–3,305
Parts per million nickel across the same eight samples
50,000 t/yr
Olivine the Company has the right to purchase under a memorandum of understanding. Not a production forecast.
- Location
- Twin Sisters olivine quarry, Whatcom County, Washington State
- Feedstock
- Olivine from the Twin Sisters ultramafic complex, quarried for foundry-sand production
- Feedstock access
- Memorandum of understanding giving the right to purchase up to 50,000 tonnes per year, with an option to increase to 100,000 tonnes per year. These volumes are potential feedstock access, not a production forecast.
- Processing technology under evaluation
- Revora Materials' IonMet™ electrochemical platform
- Initial assays
- 26.39% to 28.46% Mg and 2,660 to 3,305 ppm Ni across eight samples (September 22, 2026)
- Stage
- Sample characterization and recovery testing. No decision to construct a pilot or commercial facility has been made.
Location
The Twin Sisters olivine quarry is located in Whatcom County, Washington State. The Twin Sisters ultramafic complex is recognized as one of the largest olivine bodies in North America and is located within proximity to major transportation and industrial infrastructure on the U.S. west coast.
Sources: news releases of June 1 and July 7, 2026.
Project overview
The project is designed to evaluate the technical and commercial viability of producing magnesium, nickel and cobalt, along with other critical materials, from silicate minerals (olivine) present in ultramafic rocks.
It brings together two relationships. The first is access to domestic olivine feedstock from an active quarry operation and to a proposed site for a demonstration facility in Washington State. The second is a memorandum of understanding with Revora Materials, Inc., a New York-based company commercializing IonMet™, a proprietary electrochemical platform for recovering multiple metals from feedstocks including olivine.
The Company and Revora intend to assess the application of the technology to Twin Sisters olivine, with the objective of producing high-purity magnesium compounds and ultimately magnesium metal. The collaboration is intended to evaluate technologies capable of converting the feedstock into magnesium products, including high-purity magnesium oxide (MgO) and magnesium hydroxide.
The proposed operation is being designed around a demonstration facility capable of processing approximately 50,000 tonnes of feedstock annually, subject to technical validation, financing, permitting and definitive agreements. The project remains in the planning stage.
Separately, the Company intends to work with Columbia University to investigate natural hydrogen generation from the same ultramafic material through accelerated serpentinization. That research remains at an early stage.
Sources: news releases of May 5, July 7, August 11 and September 25, 2026.
[PLACEHOLDER: Confirm the project's formal name. The July 22, 2026 release uses both “Magnesium Project” and “Mount Vernon Magnesium Project”; later releases use “Twin Sisters”.]
[PLACEHOLDER: Confirm how Twin Sisters Olivine, Ltd. (counterparty named in the May 5, 2026 release) relates to Millbank Materials (counterparty named in the September 2026 releases).]
Initial assay results
Rock samples were collected at regular intervals across the face of an open cut at the quarry, together with samples of crushed and screened material. Samples were analysed by Bureau Veritas Laboratories in Vancouver, British Columbia, using a four-acid digestion with ICP-ES. The program included standards, blanks and duplicates.
The results are from a limited sampling program at selected quarry-face and processed-material locations and may not be representative of all material at the Twin Sisters project. The Company has not established a mineral resource or reserve at Twin Sisters, and mineral recoveries and economic viability have not yet been demonstrated.
Twin Sisters assay results, as reported in the news release of September 22, 2026. Scroll the table sideways to see all columns.
| Sample | Easting | Northing | Mg (%) | Fe (%) | Ni (ppm) | Material / location |
|---|---|---|---|---|---|---|
| 1142325 | 573161 | 5399447 | 27.64 | 6.10 | 2,660 | Existing face |
| 1142326 | 573178 | 5399418 | 28.46 | 5.55 | 3,059 | Existing face |
| 1142327 | 573154 | 5399383 | 27.46 | 5.60 | 2,712 | Existing face |
| 1142328 | 573101 | 5399381 | 28.25 | 5.71 | 2,729 | Existing face |
| 1142329 | 573082 | 5399351 | 27.12 | 5.01 | 3,305 | Existing face |
| 1142330 | 573275 | 5399516 | 26.39 | 5.65 | 2,673 | 3/8-inch-minus mine scalp |
| 1142331 | 573071 | 5399544 | 27.10 | 5.71 | 2,677 | Foundry sand |
| 1142332 | 573025 | 5399516 | 27.77 | 5.70 | 2,933 | 1/4-inch-minus mine scalp |
Why magnesium
- Magnesium is designated as a critical mineral by both the United States and Canada.
- It is used in aerospace, automotive, defence, aluminum alloys, electronics, steelmaking and lightweight manufacturing.
- The United States currently has no domestic production of primary magnesium, and North America imports the majority of its magnesium supply.
- Governments in Canada and the United States are advancing policies aimed at strengthening domestic production, expanding processing capacity and building resilient North American supply chains for critical minerals.
Sources: news releases of June 1, July 7 and July 22, 2026.
Status and next steps
Each entry links to the news release it is drawn from.
To date
- May 5, 2026Memorandum of understanding announced with Twin Sisters Olivine, Ltd. for a long-term supply of olivine material and a sublease of property in Washington State for a planned demonstration facility. Read release
- June 1, 2026Management site visit to the Twin Sisters olivine quarry in Whatcom County. Samples collected from the active quarry face and stockpiled crushed material and submitted to Bureau Veritas. Read release
- July 7, 2026Memorandum of understanding announced with Revora Materials, a New York-based company commercializing the IonMet™ electrochemical extraction platform. Read release
- September 22, 2026Assay results reported for eight samples: 26.39% to 28.46% Mg and 2,660 to 3,305 ppm Ni. Sample splits provided to Revora for independent evaluation. Read release
- September 25, 2026Representative olivine sand samples with Revora for characterization and evaluation of potential magnesium, nickel and other mineral recovery. Read release
- October 13, 2026David Frank appointed advisory Chief Technology Officer, with a mandate that includes refining the process-development pathway for Twin Sisters material. Read release
Planned next steps
- Revora to characterize the olivine sand and assess its response to the IonMet™ platform, including how minerals are released and separated, potential magnesium and nickel recoveries, product forms, purity, processing inputs and costs.
- Define follow-up mineral-processing testwork. Results are expected to inform the scope and design of any future pilot-scale work.
- Work with Columbia University to advance evaluation of the material's natural hydrogen potential.
Recovery rates, product specifications, processing costs and economic viability have not yet been established. The project will require additional engineering studies, permitting, financing and execution of definitive agreements.
Sources: news releases of May 5, September 22 and September 25, 2026.
Project imagery
This page contains forward-looking information. Statements about plans, potential products, testwork and development are subject to risks and uncertainties. See Forward-looking statements.
