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Materials powering the modern world

Rare earths are critical to advanced technology, powering innovation across the economy. At MP Materials, we proudly produce more than 10% of the world's supply, fueling the breakthroughs of today and the possibilities of tomorrow.
MOUNTAIN PASS MINE AND PROCESSING FACILITY

A unique advantage

MP Materials owns and operates Mountain Pass—located just 15 miles southwest of the California-Nevada border—home to one of the world’s richest and most significant rare earth deposits. As the only site of its kind in the Western Hemisphere, Mountain Pass integrates mining, milling, flotation, separation, refining, and finishing, delivering unmatched efficiency and scale.
Fast Facts
Mountain Pass features an expansive open-pit mine measuring approximately 2,500 feet (762 meters) east-west and 3,000 feet (914 meters) north-south, reaching a maximum depth of approximately 600 feet (183 meters).
The world-class orebody is exceptionally high grade, averaging approximately 6.0% total rare earth oxides (TREO) over life-of-mine.
With approximately 1.9 million metric tons of contained rare earth oxides at a 2.4% cutoff, Mountain Pass supports decades of American production.
Mountain Pass supplies more than 10% of the world’s rare earth content, representing a cornerstone of global industry.
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Materials products

We produce refined rare earth compounds, metals, and concentrates that power critical functions across a wide range of applications.

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Explore

The rare earth elements

These naturally-occurring materials and metals serve as the building blocks for modern technologies. Their magnetic and electrochemical properties enable advanced function, performance, durability, and efficiency across a variety of applications.
57
La
58
Ce
59
Pr
60
Nd
61
Pm
62
Sm
63
Eu
64
Gd
65
Tb
66
Dy
67
Ho
68
Er
69
Tm
70
Yb
71
Lu
21
Sc
39
Y
57
La

Lanthanum

Lanthanum is vital in automotive applications and imaging technologies. It prevents corrosion in EV batteries, improves efficiency in petroleum refining, and enables treatments for advanced lenses and vision systems.
  • CATALYSTS
  • CAMERA & TELESCOPIC LENSES
58
Ce

Cerium

Cerium plays a key role in reducing emissions through catalytic converters, is crucial in glass polishing, and powers energy-efficient LED lighting. Its versatility extends to alloys and water treatment applications.
  • AUTOMOTIVE CATALYSTS
  • GLASS POLISHING
  • LED LIGHTING
59
Pr

Praseodymium

Praseodymium is essential for creating strong NdFeB magnets used in advanced motors, adds vivid coloring to pigments, and enhances efficiency in catalytic processes.
  • NdFeB MAGNETS
  • PIGMENTS
  • CATALYSTS
60
Nd

Neodymium

Neodymium is a cornerstone for powerful magnets used in electric motors, wind turbines, and high-precision electronics. It also enhances laser technology and is used in specialized glass and ceramics.
  • NdFeB MAGNETS
  • LASERS
  • GLASS COLORING
61
Pm

Promethium

Promethium is virtually non-existent in nature and must be artificially produced. It has specialized uses in atomic batteries.
  • ATOMIC BATTERIES
  • GLASS POLISHING
  • LUMINOUS MATERIALS
62
Sm

Samarium

Samarium enables high-temperature magnets for aerospace systems, enhances optical glass, and is used in nuclear reactors for its neutron absorption properties.
  • SAMARIUM COBOLT MAGNETS
  • OPTICAL GLASS
  • NUCLEAR REACTORS
63
Eu

Europium

Europium is indispensable for producing vibrant colors in displays and LED lighting. It also plays a role in nuclear safety systems and specialized phosphors.
  • PHOSPHORS
  • LED LIGHTING
  • LASERS
64
Gd

Gadolinium

Gadolinium is a critical material for MRI contrast agents, magnetic refrigeration technologies, and high-strength alloys. It also has applications in nuclear shielding.
  • MRI CONTRAST AGENTS
  • MAGNETIC REFRIGERATION
  • SPECIALTY ALLOYS
65
Tb

Terbium

Terbium is used in green phosphors for screens and LED lighting, magnetostrictive materials for sensors, and high-temperature fuel cells.
  • PHOSPHORS
  • PERMANENT MAGNETS
  • FUEL CELLS
66
Dy

Dysprosium

Dysprosium is vital for enhancing thermal stability in NdFeB magnets, which are critical for electric vehicles and wind turbines. It also features in magnetostrictive materials and nuclear reactors.
  • PERMANENT MAGNETS
  • MAGNETOSTRICTIVE ALLOYS
  • NUCLEAR REACTORS
67
Ho

Holmium

Holmium is specialized for generating strong magnetic fields and is used in sensors, actuators, and as a dopant in lasers.
  • MAGNETS
  • ACTUATORS
  • LASERS
68
Er

Erbium

Erbium is used in fiber optics for telecommunications, in polishing glass, and as a key material in high-performance lasers.
  • FIBER OPTICS
  • GLASS POLISHING
  • LASERS
69
Tm

Thulium

Thulium has niche uses in portable X-ray devices, serves as a dopant in solid-state lasers, and improves fiber optic performance.
  • X-RAY DEVICES
  • LASERS
  • FIBER OPTICS
70
Yb

Ytterbium

Ytterbium is employed in specialty alloys for aerospace and optoelectronic materials. It is also used in advanced scientific research and fiber optics.
  • SPECIALTY ALLOYS
  • FIBER OPTICS
  • OPTOELECTRONICS
71
Lu

Lutetium

Lutetium is one of the rarest rare earths, used in high-precision medical imaging, in phosphor technologies, and as a catalyst in petroleum refining.
  • MEDICAL IMAGING
  • PHOSPHORS
  • CATALYSTS
21
Sc

Scandium

Scandium strengthens aluminum alloys for aerospace and sporting goods, boosts the efficiency of solid oxide fuel cells, and is used in advanced lighting applications.
  • ALUMINUM ALLOYS
  • SOFC
  • LIGHTING
39
Y

Yttrium

Yttrium is a critical component in ceramics, phosphors, and alloys for aerospace and energy applications. It also enhances thermal coatings and fuel cells.
  • YSZ CERAMICS
  • PHOSPHORS
  • LASERS