Gold Supply: Mine Production, Recycling and Mining Costs

Discussions of gold prices often focus on demand: central banks, jewellery buyers, investors. Supply gets less attention, partly because it changes slowly. Yet the way gold enters the market each year, and how much it costs to produce, shapes the long-term picture. This article looks at the two main sources of supply and at the cost measures used across the mining industry.

The above-ground stock

Gold is almost never consumed. Nearly all the gold ever mined still exists, as jewellery, bars, coins, central bank reserves and industrial products. Each year’s mine output adds only a small percentage to that enormous above-ground stock. This is a key difference with silver, which is partly used up by industry, as explained in Gold vs Silver.

Because the stock is so large relative to new production, the price is driven mainly by the willingness of existing holders to buy or sell, rather than by changes in mine output.

Mine production

Gold is mined on every inhabited continent. China has been the largest producer for many years, with Russia, Australia, Canada and the United States also among the leaders, followed by a long list of countries in Africa, Latin America and Asia. Rankings shift over time, so recent data from industry surveys is the best guide.

Several features define mine supply:

• Long lead times. From discovery to production often takes a decade or more, through exploration, feasibility studies, permitting, financing and construction.
• Declining grades. The average amount of gold per tonne of ore has fallen over the long run, as rich, easy deposits have been worked out.
• Large fixed costs. Once built, a mine tends to keep producing, even when prices fall, to cover its fixed costs.
• Artisanal mining. A significant amount of gold comes from small-scale, often informal mining, which is hard to measure and sometimes linked to environmental and human-rights problems.

These factors make supply sticky. A higher gold price encourages exploration and may keep marginal mines open, but it cannot quickly produce more metal.

Recycling

Recycled gold, mostly from old jewellery and to a lesser extent from electronics, is the second main source of supply. Unlike mine output, it reacts quickly to prices and economic conditions:

• When prices jump, households sell jewellery for cash, and recycling volumes rise.
• In periods of economic stress, people may sell gold out of necessity.
• When prices are expected to rise further, owners may hold on instead.

Recycling therefore acts as a flexible buffer, helping to dampen sharp price moves.

Supply sources compared

What mining costs measure

Mining companies report costs in several ways, and the terms are worth knowing.

• Cash costs cover the direct expenses of producing an ounce: labour, energy, consumables, on-site administration.
• All-in sustaining costs (AISC), a measure promoted by the World Gold Council in 2013, add the capital spending needed to keep existing operations running, plus corporate overheads and some exploration.
• All-in costs (AIC) go further and include spending on growth projects.

AISC has become the most common benchmark for comparing producers. When the gold price falls toward the industry’s average AISC, high-cost mines come under pressure, which can eventually reduce supply. Costs are influenced by energy prices, wages, local currencies and ore grades.

Why supply still matters

Supply changes rarely move the gold price on their own. But they set a background: rising costs can put a soft floor under prices over the long term, and a lack of new discoveries limits how fast production can grow. For the demand side and the shorter-term drivers, see What Moves Gold Prices and Central Banks and Gold.

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