What Are Rare Earth Elements?

Rare earth elements (REEs) are a set of 17 nearly indistinguishable lustrous silvery-white soft heavy metals, comprising the 15 lanthanides along with scandium and yttrium. Despite their name, they are relatively plentiful in the entire Earth's crust, with cerium being the 25th-most-abundant element at 68 parts per million, more abundant than copper. The term "rare" is misleading—they are not actually scarce, but rather because they are only found in compounds, not as pure metals.

Key Points

• Rare earths are spread thinly as trace impurities, so obtaining them at usable purity requires processing enormous amounts of raw ore which is costly and energy intensive.
• Rare earth elements are an essential part of many high-tech devices.
• The ones that we use the most are as common as copper or lead, and in fact you can find them on every continent, and on the ocean floor.
• By and large, rare earths are not radioactive, with promethium being the only exception, which doesn't occur in any significant abundance in the earth's crust.
• About 75 percent of rare-earth usage is based on the unique properties of the individual elements.

Understanding Rare Earth Elements

The confusion around rare earth elements begins with their name. The term "rare earth" was coined when an unusual black rock was unearthed by a miner in Ytterby, Sweden, in 1788. Early scientists named them "rare earths" because they appeared scarce compared to other mineral compounds of the time. However, this nomenclature has persisted despite being inaccurate.

The real challenge with rare earth elements isn't their abundance—it's their concentration and extraction. Although they are relatively abundant, rare-earth elements do not often occur in high concentrations, making the mining process inefficient, as a lot of power is required to extract a relatively small quantity of rare-earth elements. Additionally, rare-earth metals are difficult to extract because they are very chemically stable, meaning it takes high-intensity processing to separate the metals from their ores.

At least 245 individual REE-bearing minerals are recognized, mainly carbonates, fluorocarbonates, and hydroxylcarbonates; oxides; silicates; and phosphates. The most economically important sources are bastnaesite and monazite, the world's two largest sources of REEs, with bastnaesite typically containing cerium, lanthanum, neodymium, and praseodymium.

How Extraction Works

The process of obtaining usable rare earth elements involves multiple stages:

1. Mining and Concentration: Ores are first ground to a powder and then separated from other materials by various standard processes that include magnetic and/or electrostatic separation and flotation. All rare-earth ores contain less than 10 percent REO (rare earth oxide) and must be upgraded to about 60 percent in order to be processed further.

2. Chemical Processing: Rare earth elements exist in the form of carbonates, fluorides, phosphates, oxides or silicates in rare earth ore concentrate, usually poorly soluble in water, and after chemical changes, they are transformed into compounds which are soluble in water or mineral acid.

3. Separation and Purification: The liquid-liquid solvent extraction method, developed in the mid-1950s, is used by all rare-earth producers to separate mixtures into individual elements with purities ranging from 95 to 99.9 percent.

Why Rare Earth Elements Matter

Rare earth elements have become indispensable to modern technology and the energy transition. Rare-earth elements are necessary components of more than 200 products across a wide range of applications, especially high-tech consumer products, such as cellular telephones, computer hard drives, electric and hybrid vehicles, and flat-screen monitors and televisions.

In the energy sector specifically, the production of wind turbines relies on REEs, including neodymium, praseodymium, dysprosium, and terbium, which are used to make high-strength permanent magnets that play a vital role in direct-drive turbines, enabling them to generate more electricity from the same amount of wind. The manufacturing of permanent magnets is the largest global use for REEs, accounting for 48% of total demand in 2024.

The growing demand for clean energy technologies is driving unprecedented need for these materials. Demand for magnet rare earths—notably neodymium, praseodymium, dysprosium and terbium—has doubled since 2015 and is projected to increase by more than 30% by 2030. However, by 2035, existing and announced capacities are expected to cover only around half of mining requirements, a quarter of refining needs, and less than a fifth of magnet demand outside China.

Supply Chain Concentration and Challenges

A critical issue facing the rare earth industry is extreme geographic concentration. China is the world's largest producer with an estimated 270,000 tonnes of mined REEs and 215,000 tonnes of refined REEs in 2024, accounting for 69% of global mined production and 90% of global refined production. This dominance creates significant supply chain vulnerabilities.

The environmental impact of rare earth extraction is substantial. Current mining methods are slow, energy-intensive and highly damaging to the environment, generating acidic and radioactive waste, and leaching toxic chemicals into the ground. On average, producing one kilogram of rare earths from monazite consumes 11,170 kilograms of water, with water usage varying by element from 3,803 kilograms per kilogram of samarium or gadolinium to as high as 29,902 kilograms per kilogram of yttrium.

Related Terms

• Light Rare Earths (LREEs): Elements ranging from lanthanum to neodymium, which are more abundant than heavy rare earths.
• Heavy Rare Earths (HREEs): Elements ranging from erbium to lutetium, which are less abundant and often more strategically important.
• Beneficiation: An extractive metallurgy process that upgrades the value of raw REE-containing mineral ores by removing gangue (low value) minerals, resulting in a higher-grade product.

Frequently Asked Questions

Why are rare earth elements called "rare" if they're abundant?

The term "rare" in "rare-earth" is a misnomer because they are not actually scarce, but rather because they are only found in compounds, not as pure metals. The "earth" part refers to an old term for minerals that dissolve in acids and thus are stable to oxidation.

What are the main applications of rare earth elements?

Rare earths are components in many familiar technologies, including smartphones, LED lights, and hybrid cars, with a few rare earth elements used in oil refining and nuclear power, others important for wind turbines and electric vehicles, and more specialized uses in medicine and manufacturing.

Why is China's dominance in rare earth production a concern?

Two decades ago, China accounted for around 50% of the production of sintered permanent magnets commonly used in cars, wind turbines, industrial motors, data centres and defence systems, but this share has risen significantly to 94% today. Such high market concentration leaves global supply chains in strategic sectors—such as energy, automotive, defence and AI data centres—vulnerable to potential disruptions.

Last updated: April 20, 2026. For the latest energy news and analysis, visit energystandard.io.