Why Gold Is So Expensive — The Chemistry and Economics Behind the World's Most Coveted Metal

One troy ounce of gold takes up about 1.6 cubic centimeters, roughly a small sugar cube, and its average London price in 2025 was $3,431.5, according to the World Gold Council (WGC). A kilogram, which occupies only about 52 cubic centimeters, therefore averaged about $110,000 that year. No single fact explains a price like that. Chemistry, astrophysics, slow mining, central bank policy, and consumer habits stack on top of each other, and this article takes each layer in turn.

Educational only, not financial advice. Investing involves risk of loss; past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions. Prices and holdings below are historical data points, not forecasts.

Key takeaways

• Gold is chemically among the least reactive metals: it dissolves in aqua regia, a mixture of nitric and hydrochloric acids, but not in nitric acid alone, which is why ancient coins still shine.
• About 222,600 tonnes of gold existed above ground at the end of the second quarter of 2026, according to the WGC. Melted into one block, that is a cube roughly 22.6 meters (74 feet) on a side.
• Mines produced a record 3,671.6 tonnes in 2025, so new supply adds only about 1.6% to the stock per year.
• Gold's heavy atoms are thought to come largely from supernova. About 20 km wide but containing more mass than the Sun.">neutron star mergers, based on observations of the 2017 event GW170817.
• Demand comes from four directions at once. In 2025, the WGC counted 2,175.3 tonnes of investment demand, 1,638.0 tonnes of jewelry fabrication, 863.3 tonnes of central bank and institutional buying, and 322.8 tonnes of technology use.
• The LBMA gold price set 53 new all-time highs in 2025 and 40 in 2024.

What the price actually looks like

Before explaining a price, it helps to see how much it has moved. The WGC publishes annual averages of the LBMA (London Bullion Market Association) gold price, and the recent years show how fast the number can change.

Year	Average LBMA price (US$ per troy ounce)	Change from prior year	New record highs in year
2024	2,386.2	+23%	40
2025	3,431.5	+44%	53

Source: World Gold Council, Gold Demand Trends, full-year 2024 and full-year 2025 reports.

The WGC also estimated the total value of 2025 gold demand at US$555 billion, up 45% from 2024. That figure is a price multiplied by a quantity, and the quantity barely changed: total demand was 5,002.3 tonnes in 2025, up 1%. Almost all of the jump in value was the price itself. That is worth holding onto, because it tells you the story of recent years is not that people suddenly needed far more gold by weight. It is that each tonne was worth much more.

None of this predicts what happens next. Gold prices have fallen for multi-year stretches before, and the WGC restates prior-year figures as better data arrives. The table shows only that "expensive" has a recent history, and the layers below explain why the base level is high.

The chemistry: an element that refuses to react

Start with the periodic table. Gold is element 79, with a density of about 19.3 grams per cubic centimeter and a melting point of 1,064.18 °C (1,947.5 °F). What makes it unusual is how little it does.

Most metals corrode. Iron rusts, copper turns green, silver tarnishes in air that contains sulfur. Those reactions happen because the metal's outer electrons are available for bonding with oxygen, sulfur, or water. Gold is among the least reactive metals, and it does not oxidize in air or water under ordinary conditions. Nitric acid alone does not dissolve it, which led to the old "acid test" for checking whether a nugget was real. It does dissolve in aqua regia, a 1:3 mixture of nitric and hydrochloric acids, forming the tetrachloroaurate anion.

Why gold is yellow, and what relativity has to do with it

Gold's color is the cleanest example of a strange fact: to explain a heavy element, you need Einstein. Electrons close to a nucleus of 79 protons move at a large fraction of the speed of light, and the physics of relativity changes how their orbitals behave. According to the relativistic quantum chemistry literature, relativity pulls gold's 6s orbital inward and pushes its 5d orbital outward. That shrinks the energy gap between them. In silver, the analogous gap is wider, so silver absorbs ultraviolet light and looks white. In gold, the gap is small enough that the 5d-to-6s transition absorbs blue light, and what reflects back looks yellow.

The same relativistic effects show up next door on the table. Mercury is liquid down to about minus 39 °C, because its contracted 6s electrons contribute only weakly to bonding between mercury atoms. Color and mercury's low melting point are the textbook demonstrations. Gold's low reactivity is a related story, but the full account involves more than one effect, so it is safer to call relativity a major contributor than the sole cause.

Why the chemistry matters for price

Chemical stability turns a metal into a store of value. A gold bar buried for a century is the same bar. Coins from antiquity, such as Lydian coinage from around 610 BC, survive in recognizable condition. Compare that with a commodity that spoils, rusts, or needs storage costs to keep it intact, and you can see why many civilizations independently chose gold for coins and for ornaments. USGS notes that gold's corrosion resistance and electrical conductivity also make it an important industrial metal, used in computers, communications equipment, spacecraft, and jet aircraft engines.

Two more physical properties help. Gold is extraordinarily malleable: one gram can be beaten into a sheet of about one square meter. And it is dense enough, at about 19.3 g/cm³, that a small bar feels startlingly heavy. Tungsten has nearly the same density (19.25 g/cm³), which is why it has been used to counterfeit gold bars, but tungsten is not as chemically inert or as workable.

The cosmic origin: forged in a catastrophe

The gold in a ring did not form on Earth, or in any ordinary star. It was made in an event that dwarfs anything in the solar system, and it has been drifting since before the Sun existed.

Stars produce lighter elements by fusion, in a chain that runs up to iron. For nuclei heavier than iron, fusion stops paying back energy, so another route is needed. That route is the r-process (rapid neutron capture): a nucleus is bombarded with neutrons faster than it can decay, so it swells into heavy elements, including gold, platinum, and uranium, before it has a chance to fall apart. The conditions needed are extreme neutron densities, which narrows the list of places where it can happen. For a primer on how stars build elements, see our explainer on nucleosynthesis.

A useful analogy is a foundry that only operates during a disaster. Ordinary stars are the everyday kilns, producing carbon, oxygen, and iron on a steady schedule. The r-process foundry opens only when two neutron stars spiral together and collide.

What the 2017 observation showed

In 2017, gravitational-wave detectors and telescopes together observed a neutron star merger, labeled GW170817, and the afterglow (a "kilonova") that followed. Kasen and colleagues, writing in Nature in 2017, modeled the light from that event and found it consistent with ejecta that contained r-process elements, in two components: lighter and heavier. From the inferred ejecta mass and the merger rate, they concluded that such mergers could be a dominant source of r-process elements in the universe. That is a strong statement from a single well-observed event plus modeling, and it is worth reading as "the leading evidence" and not as a closed case. Astronomers continue to study how much other events contribute. Our piece on gravitational waves explains how detectors catch these collisions.

For price purposes, the point is subtler than "gold is rare because stars explode." The elements are not made on demand. Each atom of gold on Earth arrived as part of the material that formed the planet, and no process on or near Earth makes more of it in any quantity that matters.

The supply: a lake with a thin tap

The best picture of gold supply is a lake fed by a thin tap. The lake is everything ever mined that still exists. The tap is annual mine production. Because gold does not corrode and is rarely destroyed, the lake rarely drains. It gets recycled, melted, and re-formed, but it stays.

The WGC puts the size of the lake at roughly 222,600 tonnes as of the end of the second quarter of 2026. The WGC rounds these figures, and they are estimates. Here is how it breaks down.

Category	Approximate tonnes (end Q2 2026)	Share of total (calculated)
Jewelry	99,700	about 45%
Bars and coins (private investment)	47,800	about 21%
Official sector (central banks and similar)	39,000	about 17.5%
Other (non-jewelry fabrication and unallocated stocks)	22,100	about 10%
Over-the-counter (OTC)	10,000	about 4.5%
Gold ETFs	4,000	about 2%
Total above ground	222,600

Source: World Gold Council, "How much gold" data page, accessed October 2026. Shares are calculated from the rounded WGC figures.

How much gold would that be?

At a density of about 19.3 g/cm³, 222,600 tonnes occupies roughly 11,500 cubic meters. A cube of that volume is about 22.6 meters on each side. For comparison, Wikipedia's gold entry cites an older estimate (201,296 tonnes as of 2020) that works out to a cube about 21.7 meters on a side. The cube is growing slowly, which is the point. Whichever year you pick, the stock of every gold ring, coin, bar, and circuit board ever made would fit inside a small office building.

The stock-to-flow ratio

Mines produced 3,661.2 tonnes in 2024 and a record 3,671.6 tonnes in 2025. Divide the stock by that annual flow and you get about 60. In plain terms, it would take roughly 60 years of current mine output to produce the amount that already exists. Put another way, each year of mining adds only about 1.6% to the stock.

Recycling is a separate flow that does not enlarge the stock, because it recovers gold that already existed. The WGC counted 1,404.3 tonnes of recycled gold in 2025, up 3%, so scrap moves through the market in large amounts alongside the mined supply. High prices tend to pull more old jewelry out of drawers, but that is existing gold changing hands.

What about gold in the ground and the sea?

The WGC estimates below-ground reserves at about 61,000 tonnes, meaning gold that can be mined economically with known deposits. That is roughly a quarter of the above-ground stock, which tells you the economically accessible pool is finite on any near horizon, though reserves shift with price and technology. What about seawater? Measured concentrations are around 10 to 30 parts per quadrillion. At the low end, that implies the oceans hold about 15,000 tonnes in total. The chemist Fritz Haber analyzed 4,000 samples and showed that earlier, much higher estimates were wrong, so extraction was not feasible. Gold in the sea is present, but not practically recoverable.

The mining economics: moving a lot of rock for a little metal

Gold does not sit in veins of nuggets. Most of it is dispersed in rock at concentrations of grams per tonne, and the economics of mining it are mostly the economics of moving rock.

Metals Focus, an independent consultancy, reported (via Kitco) that the industry average head grade, the grade of ore as it enters the processing plant, peaked at 1.46 grams per tonne (g/t) in 2017 and slipped about 8% to 1.35 g/t by 2021. Open-pit mines averaged 1.29 g/t and underground mines 4.15 g/t in 2021. Since a troy ounce is 31.1035 grams, simple division tells you how much ore must be processed per ounce.

Mine type (2021 average head grade)	Grade (g/t)	Tonnes of ore per troy ounce (calculated)
Industry average	1.35	about 23
Open pit	1.29	about 24
Underground	4.15	about 7.5

Source for grades: Metals Focus via Kitco, December 2022. Ore-per-ounce figures are calculated from them and ignore recovery losses.

The table corrects a figure that circulates widely, that a mine moves only one to two tonnes of rock per ounce. Even a good underground mine handles several tonnes of ore for each ounce, and a typical open pit handles more than 20. Recovery is never complete, so the real figures are somewhat higher, and waste rock removed to reach the ore comes on top.

Why falling grades push costs up

Lower grades mean more rock must be extracted and processed for each ounce, which tends to raise the cost per ounce. Kitco's summary of the Metals Focus report adds that average grades have an inverse relationship with the gold price, because higher prices make lower-grade ore worth mining. The same report said that inflation pushed industry all-in sustaining costs to record highs in 2022 and that higher-cost, lower-grade mines were likely to come under pressure first. This does not make gold a "price floor" in a neat, fixed sense. Costs differ greatly from mine to mine, and a mine closing is a slow decision, not an instant one. But it does mean that supply is not free to expand whenever the price rises, because a new mine cannot be switched on overnight.

For a sense of scale and where the metal comes from, see our list of the biggest mines in the world. One historic example: the Witwatersrand deposit in South Africa, discovered in 1886 and the site of a gold rush, has yielded about 22% of all the gold known to exist today, according to the Wikipedia summary of the deposit's history. A single geological formation provided roughly a fifth of it.

Central banks and the long shadow of the gold standard

Gold's price is not set by miners and jewelers alone. Governments hold a large share, and their buying has become a significant force in recent years.

The WGC puts the official sector at roughly 39,000 tonnes, around 17.5% of all above-ground gold. Central banks hold it as a reserve asset, one that is not someone else's liability. A dollar deposit depends on the issuer paying; a bar in a vault does not. That distinction is why reserve managers keep some of their portfolio in gold even though it pays no interest. For a country-by-country look, see our ranking of countries with the largest gold reserves.

How much central banks have been buying

The WGC reported central bank and other institutional buying of 1,044.6 tonnes in 2024, and noted that purchases had topped 1,000 tonnes for the third consecutive year. In 2025, purchases were 863.3 tonnes, which the WGC reported as 21% lower year on year and which is still a very large amount by recent standards. The reasons given by institutions vary and are not always stated publicly, so any single explanation for the buying should be treated cautiously. Diversification away from a single reserve currency, sanctions risk, and inflation protection are all discussed by analysts, but they are interpretations, not measurements.

The gold standard's legacy

Gold was money in a formal sense for a long time. The Wikipedia entry on gold records that most gold coins stopped circulating in the 1930s and that the world gold standard was abandoned after the Nixon shock measures of 1971, which ended the dollar's convertibility into gold. Since then, currencies have been "fiat," backed by government authority rather than metal. Yet gold stayed on central bank balance sheets. USGS notes that most of the bullion produced each year historically went to government treasuries or central banks.

That history explains a lot about gold's present-day role. When people worry about inflation eroding purchasing power or about why currencies lose value, gold is an obvious thing to look at, because it has no issuer who can print more. Our explainer on how central banks control the money supply covers the other side of that relationship, and the piece on why the US dollar is the world's reserve currency covers the system in which gold now sits as a supplement. Whether gold actually protects value in a given crisis is a question about specific periods and data, and no article can promise it.

Jewelry, investment, and a demand picture that changes with the price

The tidy story that jewelry is the biggest use of gold was once reliably true, and it still dominates the above-ground stock (about 45%). But annual flows tell a different story in the last two years.

Demand category, 2025	Tonnes	Share of 5,002.3 t total (calculated)	Change from 2024 (as reported by WGC)
Investment (bars, coins, ETFs)	2,175.3	about 43.5%	+84%
Jewelry fabrication	1,638.0	about 32.7%	-19%
Central banks and other institutions	863.3	about 17.3%	-21%
Technology	322.8	about 6.5%	-1%

Source: World Gold Council, Gold Demand Trends, full-year 2025. The WGC revises prior-year data, so year-on-year changes are as published in the 2025 report.

Two details in the table are worth drawing out. First, investment demand split into 1,374.1 tonnes of bars and coins (up 16%) and 801.2 tonnes of ETFs and similar products. Second, jewelry volume fell 19% even though jewelry value rose 18% to a record US$172 billion. Buyers purchased less gold by weight but spent more money, which is what happens when the price rises faster than the volume falls.

A correction to a common claim

A common claim in older articles, including an earlier version of this one, is that jewelry demand is price-inelastic: families keep buying gold at any price. The 2025 data undercuts that. When the price rose 44%, jewelry volume fell by roughly a fifth. Some cultural demand is surely sticky, for weddings and festivals, but the aggregate response to a steep price rise was to buy lighter pieces, buy less, or wait. A more accurate statement is that jewelry demand is resilient in value terms but responsive in weight terms.

Why investors want gold

Investment demand includes the physical bars and coins, plus funds that hold gold on behalf of shareholders. People buy it for reasons that are partly financial, such as diversification, and partly psychological, such as distrust of institutions. Our explainer on why diversification reduces risk covers the first idea in general terms. Nothing here is a recommendation. Gold pays no interest or dividends, its price can fall for years, and a holding that suits one person's circumstances may not suit another's.

Industrial and medical uses: small tonnage, essential function

Technology accounts for a small share of gold demand: 326.1 tonnes in 2024 and 322.8 tonnes in 2025, which is about 6.5% of the total each year. The WGC said the 2024 increase in technology demand was driven largely by AI adoption.

Why use such an expensive material for a job when copper is cheaper? Because gold does not corrode. A connector that must work for decades, in a satellite or a server rack or a medical device, cannot afford the thin oxide film that forms on copper. A microscopic layer of gold on a contact keeps the surface clean. The amount per device is tiny, so the cost is tolerable, and that is why electronics demand is small in tonnage but hard to replace. USGS lists computers, communications equipment, spacecraft, and jet engines among the applications.

Per-device gold content figures vary widely between published estimates, so the numbers to trust here are the WGC's tonnage totals, not a gold-per-phone figure.

Gold compared with other precious metals

Why gold, and not silver, platinum, or palladium? The answer is a combination of properties that no single metal matches.

Metal	Tarnish and corrosion	Main uses	Monetary role
Gold	Very resistant	Jewelry, investment, electronics, central bank reserves	Strong, historic, still held by central banks
Silver	Tarnishes in sulfur-bearing air	Industrial uses, jewelry, investment	Historic coin metal, now minor in reserves
Platinum	Very resistant	Industrial catalysts, jewelry	Little reserve role
Palladium	Resistant	Industrial catalysts	None

Qualitative comparison of general properties and roles.

Silver is a useful comparison because it was money for centuries too. Its tarnishing is one practical disadvantage, and its heavy use in industry ties its price more closely to manufacturing cycles. Platinum and palladium are dominated by industrial demand, so they behave like industrial inputs more than like stores of value. Gold sits in a middle position where jewelry, investment, official reserves, and electronics all draw from the same finite stock. That multiplicity of buyers is what makes its demand base broad, and a broad demand base supports a high price.

What people get wrong about gold's price

"Gold is expensive because it is rare." Rarity is part of it, but not in the simple sense. There are over 220,000 tonnes above ground. What matters is the ratio of supply to the many claims on it, and the slow rate at which new supply arrives.

"Gold still backs the dollar." It does not. The link ended in 1971. Gold remains a reserve asset, but currencies are not convertible into it.

"Mining cost sets a hard floor under the price." Costs matter, and falling ore grades push them up, but costs vary widely between mines and change with energy and labor prices. A mine may keep operating at a loss for a time or close even when the price is above its cost. Treat cost as a loose influence.

"Gold always rises in a crisis." The record-high counts above show it rose strongly in 2024 and 2025, but two years do not establish a law. Gold has had long stretches of declines, and attributing any single move to any single cause is guesswork.

"The metal in electronics is why it is valuable." Technology is about 6.5% of annual demand. It matters for engineering, not for the price level.

Frequently asked questions

Q: How much gold is there in the world?
A: The World Gold Council estimated about 222,600 tonnes above ground at the end of the second quarter of 2026, with about 61,000 tonnes in below-ground reserves. The above-ground total would fit in a cube about 22.6 meters on a side.

Q: How much gold is mined each year?
A: Mine production was 3,661.2 tonnes in 2024 and a record 3,671.6 tonnes in 2025, per the WGC. That adds about 1.6% to the above-ground stock per year, ignoring recycling, which reuses existing gold.

Q: Where did gold come from?
A: Gold's heavy atoms are made by the r-process, which needs extreme neutron densities. Observations of the neutron star merger GW170817 in 2017 led researchers to conclude that such mergers could be a dominant source of r-process elements, which makes them the leading candidate for where most gold formed.

Q: Do central banks really hold that much gold?
A: Yes. The official sector holds roughly 39,000 tonnes, about 17.5% of the above-ground stock. Central banks and institutions bought 1,044.6 tonnes in 2024 and 863.3 tonnes in 2025, per the WGC.

Q: Why is gold used in electronics if it is so costly?
A: Gold does not corrode, so contacts stay conductive for decades, and only a thin layer is needed. Technology demand was 322.8 tonnes in 2025, about 6.5% of the total.

Q: Is gold a good investment?
A: That depends on a person's goals and circumstances, and this article cannot advise on it. Gold pays no interest or dividends, and its price has risen and fallen over multi-year periods. A licensed financial advisor can address individual situations.

Q: Why did jewelry demand fall when the price rose?
A: The WGC reported that jewelry fabrication fell 19% in 2025 to 1,638.0 tonnes while its value rose 18% to a record US$172 billion. Buyers spent more in dollars for less metal by weight, which is what a sharp price rise tends to produce.

The takeaway

Gold is expensive because several independent facts hold at once. It resists corrosion, so what was mined centuries ago still exists. It was made in rare, violent events and cannot be manufactured. Mines add only about 1.6% to the stock each year, and they do it by processing more than twenty tonnes of ore per ounce at typical open-pit grades. Meanwhile, investors, jewelers, electronics makers, and central banks all draw from the same stock. In 2025, that meant investors bought 84% more than the year before while jewelry buyers bought a fifth less, and the average price rose 44%. The price tells you what the marginal buyer will pay today, and it can change quickly in either direction.

Related reading

• Why Gold Is Valuable
• Why Champagne Is So Expensive — The Science and Economics of the World's Most Famous Sparkling Wine
• Why Silk Is So Expensive — The Ancient Biology Behind the World's Most Coveted Fabric
• Why Cashmere Is So Expensive — The Science Behind the World's Softest Fiber
• Why Diamonds Are So Expensive — And Whether Lab-Grown Ones Change Everything
• What Is Compound Interest — and Why It Matters So Much

Sources

• World Gold Council: Gold Demand Trends, Full Year 2024
• World Gold Council: Gold Demand Trends, Full Year 2025
• World Gold Council: How much gold has been mined
• Kasen et al., "Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event," Nature, 2017 (arXiv version)
• USGS National Minerals Information Center: Gold statistics and information
• Kitco: Falling head grades put pressure on gold mining industry (Metals Focus report)
• Wikipedia: Gold
• Wikipedia: Relativistic quantum chemistry