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Last updated: August 15, 2026 · By White Metal Resources Editorial
Quick answer: Rhodium is a silvery platinum-group metal used mainly in three-way catalytic converters on gasoline vehicles, where it controls nitrogen-oxide emissions. Annual mine supply is small, around 21 to 24 tonnes per year, and roughly four fifths of it comes from South Africa. Autos absorb about 85 percent of demand, so a small industrial swing can move the price by thousands of dollars per ounce.
The retail investment market for rhodium is essentially wholesale-only. There is no LBMA fixing, no US-mint coin, and no deep exchange-traded fund. Rhodium is traded as sponge, powder or plate through refiners and industrial buyers, which is why quoted spreads are wider than for gold or silver and why annual average prices have ranged from roughly 700 dollars to over 20,000 dollars per troy ounce in the last decade.
Short on time? The essentials
- Rhodium is member of the platinum-group metals family, alongside platinum, palladium, ruthenium, iridium and osmium.
- Global primary supply totalled about 701,000 ounces (about 21.8 tonnes) in 2025 per Johnson Matthey. Adding autocatalyst recycling brings combined supply to about 31.5 tonnes.
- South Africa produced 566,000 ounces of primary rhodium in 2025, roughly 81 percent of the world total. Russia, Zimbabwe and North America split the rest.
- Automotive catalysts consumed about 899,000 ounces in 2025, about 85 percent of total demand. Chemical, glass and electrical uses split the remainder.
- USGS annual average price ranged from 697 dollars in 2016 to 20,254 dollars in 2021, then retraced to 4,600 dollars in 2024. That range is a documented characteristic of a thin market, not a forecast.
- There is no LBMA rhodium fixing and no US Mint rhodium coin. The London Platinum and Palladium Market runs a sponge accreditation list, not a bar Good Delivery list.
- Rhodium sells physically as sponge or powder for industrial buyers and as small plate for a limited retail audience. Retail spreads are typically much wider than for gold or silver.
- Rhodium is not IRA-eligible under IRC 408(m)(3)(B). Held in a retirement account this becomes a different topic, covered in our rhodium and iridium IRA eligibility guide.
- Melt value for retail buyers is computed from weight and current spot in dollars per troy ounce, then a dealer premium is added. Rhodium has no widely recognised retail premium tier.
This page is for a general reader who has heard the name rhodium, maybe in the context of catalytic converter theft or a jewellery plating job. It gives a plain picture of what the metal is, where it comes from, what it costs and why. It does not try to sell rhodium and it does not predict the price. It walks through documented supply, documented demand, and the structural reasons the market behaves the way it does.
What rhodium actually is
Rhodium is a silvery-white transition metal. It sits in group 9 of the periodic table with cobalt and iridium, and it is one of the six platinum-group metals. Its atomic number is 45 and its symbol is Rh. Discovered in 1803 by William Hyde Wollaston, rhodium remains one of the rarest stable elements in the Earth crust.
The metal has an unusually high melting point of about 1,964 degrees Celsius and outstanding corrosion resistance. It does not tarnish in air and it resists most acids. Johnson Matthey summarises the material advantage in one line: rhodium high melting point, high-temperature stability and corrosion resistance make it a key component in vehicle emission control, glass production and chemical catalysts (source: Johnson Matthey, Rhodium product page).
Rhodium is almost always found in nature mixed with the other PGMs, particularly platinum and palladium, and with base metals like nickel and copper. It is never mined on its own. Every ounce of rhodium in the world comes out of the same shafts that produce platinum and palladium, mostly as a co-product.
Where rhodium comes from and how much is produced
Rhodium is a small market by any yardstick. Johnson Matthey put 2025 world primary supply at 701,000 troy ounces, or about 21.8 tonnes. Adding automotive recycling raises combined supply to about 1.01 million ounces, or 31.5 tonnes (source: Johnson Matthey PGM Market Report, May 2026, Rhodium supply and demand tables).
South Africa dominates. Its 2025 primary rhodium output was 566,000 ounces, roughly 81 percent of world primary supply. Russia, Zimbabwe, North America and small operations elsewhere split the balance.
This concentration reflects geology, not policy. It comes from the Bushveld Complex, the layered igneous body under the highveld that hosts the world largest identified PGM reserves. The United States Geological Survey estimates world PGM resources at more than 100 million kilograms, with the largest reserves located in that same Bushveld Complex (source: USGS Mineral Commodity Summaries 2025, Platinum-Group Metals).
| Country | Primary supply (thousand troy ounces) | Share of world primary supply |
|---|---|---|
| South Africa | 566 | 81 percent |
| Russia | 68 | 10 percent |
| Zimbabwe | 45 | 6 percent |
| North America | 15 | 2 percent |
| Others | 7 | 1 percent |
| World primary supply | 701 | 100 percent |
Source: Johnson Matthey PGM Market Report, May 2026, Table on page 31 (Rhodium supply and demand, troy ounces). Shares are computed from the underlying JM totals and rounded to whole percentages. Checked August 2026.
Secondary supply comes almost entirely from recycled automotive catalysts. Johnson Matthey put open-loop autocatalyst recycling of rhodium at 312,000 ounces in 2025, meaningful in isolation but still less than half of primary mine output. The main structural point is simple: rhodium supply is concentrated by geography and by co-production, and neither of those features responds quickly to a price signal.
What rhodium is used for
Rhodium demand is dominated by one job: reducing nitrogen-oxide emissions on gasoline vehicles. In a three-way catalytic converter, rhodium sits alongside platinum and palladium and does the reduction step. It turns NOx into nitrogen and oxygen while its PGM partners handle carbon monoxide and unburnt hydrocarbons.
Johnson Matthey states the case plainly. Rhodium selectivity and control of NOx emissions, plus its tolerance to poisons in the exhaust, make it critical in gasoline vehicles and unrivalled by any other metal (source: Johnson Matthey, Rhodium product page).
The rest of demand splits into a handful of technical uses. Rhodium appears in platinum-rhodium alloys used in glassmaking equipment, where the alloy withstands the very high temperatures needed to draw fibreglass and manufacture LCD glass. It serves as a catalyst in bulk chemistry, notably for producing acetic acid and oxo-alcohol plasticisers. A smaller share supports jewellery plating on white gold and platinum pieces, plus electrical contacts and thermocouples.
| End use | Demand (thousand troy ounces) | Share of total demand |
|---|---|---|
| Automotive catalysts | 899 | 85 percent |
| Chemical catalysts | 91 | 9 percent |
| Glass manufacturing | 38 | 4 percent |
| Other (jewellery plating, electrical) | 26 | 2 percent |
| Electrical and electronics | 9 | 1 percent |
| Total demand | 1,063 | 101 percent (rounding) |
Source: Johnson Matthey PGM Market Report, May 2026, Rhodium supply and demand table (2025 figures, in troy ounces). Shares are computed from the underlying JM totals and rounded to whole percentages. Checked August 2026.
Two takeaways matter. First, one industry, automotive emissions control, accounts for the vast majority of rhodium consumption. Any change in gasoline vehicle production, average catalyst loading, or emissions rules ripples into rhodium in a way it does not with a diversified market like gold. Second, the technical uses are hard to substitute quickly. A glass plant fitting bushings or a plasticiser producer that has qualified a rhodium-based process cannot switch metals in a week.
Why the rhodium price moves so much
Rhodium is famous for large price swings. The reasons are structural, not mysterious. Four features do most of the work.
The market is small. Annual global primary supply of about 21.8 tonnes fits in a single shipping container. Compare that to gold at more than 3,000 tonnes per year of mine production. A relatively small change in autocatalyst demand or in South African mine output can push rhodium into significant surplus or deficit.
Demand is concentrated. About 85 percent of consumption goes into one application. When gasoline vehicle production rises, or when a stricter NOx standard raises average catalyst loading, rhodium demand jumps. When the fleet mix shifts toward battery-electric vehicles, the drag lands mostly on rhodium among the PGMs.
Supply is inelastic. Rhodium is a co-product. Miners cannot dial rhodium up without also mining more platinum and palladium, and the reverse. A price signal on rhodium therefore takes years to translate into a supply response, and the response is capped by the geological ratio inside the ore.
There is no deep ETF or exchange fixing. Rhodium has no daily LBMA fix, no NYMEX front-month contract, and only very small physically-backed exchange-traded funds. Johnson Matthey noted that rhodium ETFs saw active purchasing for the first time in nearly a decade in 2025 (source: Johnson Matthey PGM Market Report, May 2026, PGM summary).
That comment tells you how thin the investment layer is. Without a large ETF sitting between industrial buyers and refiners, industrial demand shocks translate almost directly into price.
The pattern in 2025 illustrated all four features at once. Johnson Matthey reported rhodium moving through 5,000 dollars per ounce in early 2025 on weak first-quarter South African sales. The price climbed above 7,000 dollars in late July, reached 8,000 dollars in October and spiked above 9,000 dollars in the final days of December. Firm demand, constrained supply and strategic buying combined to double the price within a year.
A decade of USGS annual average prices
The chart below shows the USGS annual average price for rhodium from 2015 to 2024, in United States dollars per troy ounce. USGS derives its number each year from published dealer quotes. These are annual averages, not real-time spot, so intra-year highs and lows were substantially wider than the bars suggest.
The 2015-to-2016 dip to 697 dollars was a quiet market. The 2019-to-2021 climb from 3,919 dollars to 20,254 dollars reflected tight emissions rules in China and Europe, forced increases in per-vehicle catalyst loading, and supply hits in South Africa. The 2022-to-2024 slide back to 4,600 dollars reflected inventory unwind, softer autocatalyst offtake and the market anticipation of faster battery-electric adoption. These are documented drivers reported by USGS and Johnson Matthey, not a prediction about the next move.
Physical forms: sponge, powder and plate
Rhodium is sold in industrial forms first and retail forms second. The most common wholesale products are:
- Sponge: a granular high-purity refined form, typically 99.95 percent or better, delivered in sealed cans or foils. Sponge is the standard delivery form under the London Platinum and Palladium Market sponge accreditation scheme (source: LPPM, Sponge Accreditation Rules for Rhodium).
- Powder: similar to sponge but finer, used in some catalyst manufacturing.
- Plate or ingot: a cast form used in glassmaking alloys and some chemical processes.
The LPPM runs a sponge accreditation list for rhodium, alongside its bar Good Delivery lists for platinum and palladium. There is no equivalent bar Good Delivery list for rhodium, because rhodium is not commonly cast into large trading bars. Wholesale rhodium moves in cans of sponge among a small circle of refiners, industrial buyers and specialised traders.
Retail buyers do encounter small rhodium bars, typically 1 gram, 5 gram, 1 ounce or 100 gram, sold as investment or collector pieces by a handful of dealers. These are a niche product. The buy-sell spread is wide, and secondary-market liquidity depends on finding the same narrow dealer network.
Why the retail investment market is essentially wholesale-only
Three features push rhodium out of the standard retail bullion channel. Understanding them helps explain the pricing you see when you shop.
No trusted daily benchmark. Gold and silver retail dealers price everything off the LBMA fix or a NYMEX quote refreshed every few seconds. Rhodium has no equivalent single benchmark. Dealers quote off wholesale sponge indications published by trading houses such as Johnson Matthey, plus their own risk margin.
Thin two-way market. A dealer who sells you a 1 ounce rhodium bar has to buy replacement metal from a refiner or a wholesale broker, and eventually buy your bar back when you want to sell. Neither leg is as liquid as gold. That inventory risk is priced into a wider spread.
No standard collector premium tier. Silver Eagles and gold Krugerrands carry a documented retail premium tier over spot, backed by minted volume in the tens of millions. Rhodium bars have no such tier because the retail volume is a rounding error on the industrial market. Any premium you pay is dealer-specific, so shop with more than one seller before deciding on a price.
The practical takeaway is that rhodium behaves like an industrial input first and an investment second. That is not a value judgement; it is a description of the market plumbing.
Worked example: computing melt value for a small rhodium bar
Because there is no widely recognised retail premium tier for rhodium, the honest way to talk about the value of a physical bar is to compute the melt value from weight and an example spot price. Choose an example spot, then convert the weight to troy ounces, then multiply.
Suppose you own a 1 ounce rhodium bar marked 99.95 percent fine. Assume, only for the arithmetic, an illustrative wholesale sponge price of 6,000 dollars per troy ounce (this is inside the range JM reported for early-to-mid 2025 but is not a current quote).
- Rhodium content: 1 troy ounce times 99.95 percent equals 0.9995 troy ounces of pure rhodium.
- Rhodium value at 6,000 dollars per troy ounce: 0.9995 times 6,000 equals 5,997 dollars of metal in the bar.
- Retail dealer buy-back: a dealer might offer you 5 to 15 percent under the metal value to cover inventory and refining risk, so a plausible offer sits between 5,097 dollars (15 percent under) and 5,697 dollars (5 percent under).
- Retail asking price on a comparable new bar: a seller might list at 10 to 25 percent above metal value, so between 6,597 dollars and 7,496 dollars.
These numbers illustrate the mechanic, not a current market. Substitute the actual spot rhodium wholesale price at the moment you are quoting, and adjust for the specific dealer you are working with. The relative spread of 10 to 40 percent between the low buy-back and the high asking price is a documented characteristic of thin markets, not a prediction of future spreads.
Limits and caveats
A few things this page deliberately does not do. It does not quote a live rhodium price. Rhodium moves too fast for any static number on a web page to be useful. It does not name a dealer or endorse a bar product, because the retail rhodium market is small and the right seller depends on your location and needs. It does not predict where the rhodium price will go, in either direction.
Two other honest limits belong here. The Johnson Matthey supply and demand tables are the industry standard reference, but they are estimates prepared by Metals Focus for JM, not audited financial data. The USGS annual averages are constructed from published dealer quotes, so they smooth away the intra-year peaks that make headlines. Neither source is wrong; they simply describe the market at different levels of resolution.
Finally, rhodium in a retirement account is a different topic. The tax code names only four bullion metals as eligible for a self-directed IRA under IRC 408(m)(3)(B), and rhodium is not on that list. If a retirement wrapper is part of your question, that constraint is covered in our rhodium and iridium IRA eligibility guide.
Rhodium metal questions, answered
Is rhodium a precious metal?
Yes, in the technical sense. Rhodium is one of the six platinum-group metals recognised by the United States Geological Survey and by industry references. Precious metal here means a corrosion-resistant metallic element with high market value relative to its mass. Rhodium fits all three criteria.
Where is most rhodium mined?
South Africa produced about 566,000 troy ounces of primary rhodium in 2025, roughly 81 percent of the world total, according to Johnson Matthey. Russia, Zimbabwe and North America split most of the remainder. The reason is geology: the Bushveld Complex in South Africa hosts the world largest identified reserves of platinum-group metals.
What is the main use of rhodium?
Emissions control. Roughly 85 percent of global rhodium demand goes into three-way catalytic converters on gasoline vehicles, where it converts nitrogen-oxide emissions into harmless nitrogen and oxygen. Smaller shares support glass-manufacturing alloys, chemical catalysts, jewellery plating and electrical contacts.
Why has the rhodium price ranged from a few hundred dollars to over 20,000 dollars per ounce?
Rhodium trades in a small, concentrated market. Annual mine supply is about 21.8 tonnes, roughly 85 percent of demand is one application, and there is no deep ETF absorbing shocks. Small changes in vehicle production or in South African mine output can move the balance from surplus to deficit, and the price responds sharply. USGS annual averages went from 697 dollars in 2016 to 20,254 dollars in 2021, then back to 4,600 dollars in 2024.
Can I buy rhodium coins from a national mint?
No sovereign mint issues a legal-tender rhodium coin at scale. The Royal Canadian Mint has produced small commemorative rhodium items and a handful of refiners issue small rhodium bars, but there is no equivalent to the American Gold Eagle or the Silver Maple Leaf for rhodium.
Is there an LBMA rhodium fix or a NYMEX rhodium futures contract?
No. There is no daily LBMA fixing for rhodium. NYMEX does not list a physically-settled rhodium futures contract. The London Platinum and Palladium Market operates a sponge accreditation list for rhodium, but this is a refiner-quality standard, not a daily price benchmark.
Is rhodium jewellery pure rhodium?
Almost never. Rhodium plating is a thin layer, typically less than one micron, applied over white gold or platinum jewellery to brighten the surface and slow tarnish on nickel-white-gold alloys. Solid rhodium jewellery would be uncommonly brittle and expensive. If a piece is sold as rhodium, it is almost certainly plated.
Does rhodium tarnish?
Very little. Rhodium resists most acids and does not tarnish under ordinary conditions. That corrosion resistance is one reason it is used as a plating on other jewellery metals, and one reason platinum-rhodium alloys survive the high temperatures of fibreglass bushings without significant surface degradation.
Sources
- Johnson Matthey PGM Market Report, May 2026 (rhodium supply and demand tables on pages 31 and 32, PGM summary on pages 5 to 8). Checked August 2026.
- Johnson Matthey, Rhodium product and market page (uses, three-way catalyst role, glass, chemical catalysis). Checked August 2026.
- United States Geological Survey, Mineral Commodity Summaries 2025, Platinum-Group Metals (annual averages 2020 through 2024, world reserves). Checked August 2026.
- United States Geological Survey, Mineral Commodity Summaries 2020, Platinum-Group Metals (annual averages 2015 through 2018). Checked August 2026.
- London Platinum and Palladium Market, Sponge Accreditation Rules for Rhodium. Checked August 2026.
- London Platinum and Palladium Market, home page (Good Delivery scope for Pt and Pd, sponge accreditation for rhodium). Checked August 2026.
- Cornell Legal Information Institute, 26 U.S.C. section 408 (list of IRA-eligible bullion metals in subsection (m)). Checked August 2026.
