Examples of Rare Earth Minerals: 12 Ores and Their Uses

The main examples of rare earth minerals are bastnaesite, monazite and xenotime. Loparite, parisite, synchysite, allanite, eudialyte, florencite, fluorapatite, fergusonite and gadolinite complete the 12 ores and host minerals compared here. The USGS recognises at least 245 minerals that carry rare earths (USGS, 2017), but only a few have supplied most commercial output.

A rare earth mineral is the natural compound found in rock or sand. A rare earth element is one chemical element inside it, such as neodymium. People often mix the two, so this page keeps them apart: first the minerals and the deposits that hold them, then the metals and what each is used for. For a short definition of the whole group, see our guide to rare earth elements, metals and minerals.

12 examples of rare earth minerals compared

The table lists each mineral, its chemical type, its rare earth character and where it occurs. REE means rare earth element, and REO means rare earth oxide, the standard unit for reporting grade and output. Formulas and settings come from the USGS critical minerals chapter on rare earths.

How we chose these minerals

We picked minerals named by the USGS as selected ore or host minerals, favouring those with a stated role in a producing or advanced setting. The order starts with the three the sources treat as most established, then runs by mineral type. It is not a ranking of tonnage, because no single source we opened gives world output by mineral.

The three minerals behind most rare earth supply

Bastnaesite: the main light rare earth ore

The USGS says bastnaesite may be the most important rare earth mineral, because it is the primary ore mineral of the two largest deposits, Mountain Pass in California and Bayan Obo in China. The Mountain Pass orebody, the Sulphide Queen carbonatite, holds about 10 to 15% bastnaesite. A carbonatite is an unusual igneous rock made mostly of carbonate minerals. Bastnaesite ores are strongly enriched in the light rare earths such as cerium, lanthanum and neodymium. The Royal Society of Chemistry gives 38% lanthanum for bastnaesite and 25% for monazite.

Monazite: the placer mineral with a thorium issue

Monazite resists weathering and survives transport down rivers to the coast, which is why it is the principal rare earth mineral taken from placers (loose sediment deposits). In typical monazite-(Ce) sands, the lanthanides are about 45 to 48% cerium, 24% lanthanum and 17% neodymium. Thorium in the mineral makes it radioactive. Placers were important sources until the mid-1960s, when the discovery of Mountain Pass reduced their prominence. In the United States, monazite is still produced from heavy-mineral-sand concentrates in the southeast (USGS, 2026).

Xenotime: yttrium and the heavies

Xenotime is yttrium phosphate. Its lanthanide content runs about two-thirds yttrium, with most of the rest heavy lanthanides. That makes it interesting for heavy elements, some of them very costly, such as terbium, dysprosium and lutetium. It occurs in gneiss, such as at Music Valley in California, and with monazite in placers. The USGS reports yttrium-rich xenotime in Florida monazite concentrates (2026).

Other rare earth minerals consultants meet in the field

Loparite is a perovskite-group mineral mined with niobium in nepheline syenite on Russia’s Kola Peninsula. The USGS lists loparite concentrate from the Lovozero deposit at 30 to 35% REO, strongly enriched in light rare earths.

Parisite and synchysite belong to the same fluorocarbonate family as bastnaesite and often appear beside it. Their fine intergrowths can matter to a metallurgist because a mixed assemblage may not behave like pure bastnaesite in the plant.

Allanite is a silicate that can hold up to 20% rare earths along with thorium. Eudialyte is a zirconium silicate of peralkaline rocks, meaning igneous rocks rich in sodium and potassium relative to aluminium. It is used as a minor ore of zirconium. The USGS notes that peralkaline systems are usually richer in heavy rare earths than carbonatites, though their mineralogy can be complex. Bokan Mountain in Alaska has more than 20 rare earth and yttrium minerals, and Khibiny in Russia has 45.

Florencite is a secondary mineral. It forms in thick weathered laterite above carbonatite, together with monazite, rhabdophane and cerianite, at places such as Mount Weld in Western Australia and Araxá in Brazil. Fluorapatite is a common phosphate that can take rare earths into its structure. The Pea Ridge iron deposit in Missouri is a USGS example of rare-earth-bearing fluorapatite with xenotime and monazite.

Ion-adsorption clays are an ore, not a mineral

Some of the most valuable heavy rare earth supply has no distinct ore mineral. In ion-adsorption clays, rare earths are held loosely on clay surfaces in weathered granite. Southern China’s clays are the world’s primary heavy rare earth source, at about 0.05 to 0.4% REO, and they lack radioactivity (USGS, 2017). That grade is far below hard-rock ores, yet the USGS says these clays are valued for their medium and heavy rare earths. Grade alone does not decide value.

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Rare earth deposits: which mineral sits where

Deposit type largely decides which mineral you will find. The USGS names seven settings: carbonatites, peralkaline igneous systems, magnetite-hematite bodies, iron oxide-copper-gold deposits, xenotime-monazite accumulations in gneiss, ion-adsorption clays and placers. Our guide to types of ore deposits explains how these fit among other metals. The chart compares grades reported in that USGS table. They come from different dates and bases, and reported figures may have changed since, so read them as a guide to scale and not as current reserves.

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Reported grades at selected rare earth deposits

Total REO, weight percent; dates differ by deposit

• Mountain Pass, California: bastnaesite in carbonatite; 16.7 million tonnes at 7.98% REO reported by a former owner in 2012. MP Materials restarted the site after acquiring it in 2017.
• Bayan Obo, China: about 800 million tonnes at 6% in a 2009 estimate for the whole deposit.
• Mount Weld, Western Australia: weathered carbonatite with secondary phosphates; 23.9 million tonnes at 7.9% REO as of January 2012. Lynas operates the mine and processes in Malaysia.
• Bear Lodge, Wyoming: a bastnaesite-group carbonatite project; see our comparison of Wyoming rare earth deposits.

Rare earth elements list: light, heavy and how common each is

The rare earths are the 15 lanthanides from lanthanum to lutetium, plus yttrium in most geological work. The common count of 17 also includes scandium. Promethium is left out of the USGS table because it is extremely rare in nature.

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How common selected rare earths are in the crust

Average crustal abundance, parts per million

Groupings differ. The 2017 USGS chapter treats lanthanum to gadolinium as light and yttrium plus terbium to lutetium as heavy. Its 2026 summary names terbium through lutetium as heavy and reports yttrium separately. So europium and gadolinium are not heavy rare earths on these USGS definitions, although some writers list them that way. Check which definition a report uses before comparing “heavy” percentages.

Despite the name, these elements are not scarce on average. Cerium is more common in the crust than copper or lead, and all but promethium are more abundant than silver, gold or platinum. What is unusual is a deposit concentrated enough to mine.

Examples of rare earth metals and their top uses

These seven use groups account for the applications the USGS and the Royal Society of Chemistry describe most prominently. Worldwide, magnets were the estimated leading use, while catalysts led in the United States (USGS, 2026).

1. Permanent magnets (neodymium, praseodymium, dysprosium, samarium). Neodymium’s main use is in very strong iron-boron magnets, found in electric motors, wind turbines, phones and aircraft actuators. Dysprosium helps these magnets resist demagnetising at high temperature. Samarium-cobalt magnets are less powerful but handle heat better.
2. Catalysts (lanthanum, cerium). Lanthanum goes into petroleum refining catalysts, and cerium into catalytic converters.
3. Glass and polishing (cerium, lanthanum). Cerium oxide is uniquely suited to polishing glass, and lanthanum oxide goes into special optical glass.
4. Batteries (lanthanum). Nickel-metal hydride batteries use a lanthanum-based alloy in the anode.
5. Phosphors and displays (europium, yttrium). Europium is the classic red phosphor in screens and fluorescent lights. Yttrium’s leading uses are ceramics and phosphors (USGS, 2026).
6. Medical imaging (gadolinium). Gadolinium compounds are used in MRI, and the metal also goes into magnets and alloys.
7. Lasers, fibre optics and defence (erbium, yttrium, samarium and others). Erbium-doped fibre amplifies signals in long-distance optical cables, yttrium-aluminum-garnet crystals serve as lasers, and samarium-cobalt magnets stay magnetic at high temperature. US stockpile plans have included neodymium-iron-boron magnet block and samarium-cobalt alloy (USGS, 2026).

Rare earth prices by element

Value differs enormously by element, which is why the mix inside a mineral matters as much as total grade. These are USGS 2025 estimated averages for oxides, with terbium, dysprosium and lutetium from its heavy rare earths chapter, the latest annual series we opened, not today’s quotes.

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NdPr and dysprosium oxide prices are below their 2021 to 2022 highs

US$ per kg, annual average; 2025 is a USGS estimate

Cerium and lanthanum are abundant in bastnaesite and monazite but sell for very little. A deposit’s revenue therefore often leans on its smaller share of neodymium, praseodymium, dysprosium and terbium. Separated oxide prices are also not what a mine receives for concentrate, so use them only for a first comparison.

Where rare earth minerals are mined

World mine output was an estimated 390,000 tons of REO in 2025, of which China produced 270,000 (USGS, 2026). The United States produced 51,000 tons from bastnaesite at Mountain Pass and monazite from southeastern sands. Reported reserves exceed 75 million tons, with China at 44 million, Brazil 11 million and Australia 6.3 million.

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Rare earth mine output, selected producers, 2025

Thousand tons of REO, estimates

China also tightened export controls on several rare earths in April 2025 and suspended an October expansion for one year in November, while the April controls stayed in place (USGS, 2026). US net import reliance for heavy rare earth compounds and metals was still 100% in 2025. For who is working on new supply, see our list of rare earth exploration companies, and for US sites our US mining map. Company mentions here are facts, not investment advice.

How to identify rare earth minerals in a project

Few of these minerals can be named reliably in a hand sample. A sensible order of work for a consultant or licence holder looks like this:

1. Start with the geology. Carbonatite, peralkaline intrusion, laterite over alkaline rock or a heavy-mineral sand each point to different minerals.
2. Screen with geophysics and imagery. The USGS notes that airborne gamma-ray surveys can detect monazite radioactivity where hosts are exposed, and handheld radiation meters can find monazite-rich zones. Clays lack this signal. Satellite imagery can help map exposed rock and alteration before field work, and Farmonaut offers this kind of screening from a KML or polygon. It gives exploration targets, not a resource estimate.
3. Sample properly. Stream-sediment heavy concentrates suit resistant minerals. Laterites need samples from selected soil horizons, tested for rare earth content and leachability.
4. Assay all elements. Ask for each rare earth individually, plus thorium and uranium, not just total REO.
5. Confirm the mineralogy. Laboratory work should show which minerals hold the valuable elements and how the grains are intergrown, since that shapes the flowsheet.
6. Plan for separation. Rare earths are chemically close, and separating them uses ion exchange and solvent extraction. Early talks with a processor or qualified metallurgist can save effort.

Land rights and permits still apply. Get permission for any sampling, follow radiation rules when handling thorium-bearing material, and speak to the regulator or contact us if you have a mapping question. Project owners can also send area details through our mining query form, or read how satellite-based mineral detection works, with reports typically taking 5 to 20 business days.

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Estimate what a rare earth deposit contains

Grade is usually quoted as total REO, but tonnes of magnet oxide often say more. The calculator turns ore tonnage, total grade and a neodymium-praseodymium (NdPr) share into contained tonnes and a rough gross value of the recovered NdPr. Replace the examples with assay data, and remember that this value ignores all mining and processing costs.

Environmental and waste checks for rare earth projects

Radioactivity is the first question. Thorium occurs in monazite, can occur in allanite and other minerals, and a radioactive signature is common in rare earth mineralisation. Clays are different because they lack it, though their leaching method needs its own review.

The USGS also cautions that environmental information on rare earth mining is limited, because few mines have operated and little has been published on the largest. Toxicological data are limited as well. Treat broad claims in either direction with care, and base a project’s plan on site baseline water, soil and radiation measurements. Recycling is real but small: the USGS reports limited recovery from batteries, permanent magnets and fluorescent lamps (2026).

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Frequently asked questions

What are examples of rare earth minerals?

Bastnaesite, monazite and xenotime are the main ones. Others include loparite, parisite, synchysite, allanite, eudialyte, florencite, fluorapatite, fergusonite and gadolinite.

What are examples of rare earth metals?

Neodymium, cerium, lanthanum, praseodymium, samarium, europium, gadolinium, terbium, dysprosium and yttrium are well-known examples. They are extracted from the minerals above.

What is the difference between a rare earth mineral and a rare earth element?

An element is a single chemical substance, such as cerium. A mineral is a natural crystalline compound, such as bastnaesite, that holds several of those elements.

Which rare earth mineral is most important?

The USGS says bastnaesite may be considered the most important because it is the primary ore mineral at Mountain Pass and Bayan Obo.

Are rare earth minerals actually rare?

The elements are not rare on average in the crust. Concentrated, economic deposits are what is unusual, and they occur in uncommon rock types.

Which rare earth minerals are radioactive?

Monazite contains thorium and is the best-known case. Allanite and some other rare earth minerals can also carry thorium or uranium, so test each deposit.

Which minerals contain heavy rare earths?

Xenotime and fergusonite are yttrium-rich minerals, and peralkaline rocks are generally richer in heavy rare earths than carbonatites. Ion-adsorption clays are the leading heavy source, though they are not a single mineral.

What are rare earth minerals used for?

After separation, their elements go into magnets, catalysts, glass and polishing powders, batteries, phosphors, medical imaging, lasers and fibre optics. Magnets were the estimated leading global use (USGS, 2026).

Which rare earth metals are used in electronics?

Neodymium, praseodymium and dysprosium go into magnets for phones, speakers and drives. Europium and yttrium have been used in phosphors, and cerium oxide polishes glass.

Where are rare earth minerals found?

Major sites include Bayan Obo and southern China’s clays, Mountain Pass in California, Mount Weld in Western Australia and Lovozero in Russia. Brazil and Australia also hold large reserves (USGS, 2026).