The coin in a collector’s hand and the bar in a vault started life as rock. The path from ore to investment-grade bullion is long, expensive, and slow — and that slowness is a big part of why gold behaves the way it does as an asset. Here is how gold is produced, and what it means for the price.
Where the world’s gold comes from
Gold is mined on every inhabited continent, with China, Australia, Russia, the United States, Canada, and several African and South American nations among the largest producers. Alongside fresh mining, a significant share of annual supply comes from recycled gold — old jewelry and electronics refined back into bullion. Remarkably, all the gold ever mined in human history would fit into a surprisingly small space; its rarity is not a marketing story but a geological fact.
Mining methods
Two main approaches dominate. Open-pit mining removes gold from large surface deposits, while underground mining follows richer veins deep below ground. Either way the grades are astonishingly low — often just a few grams of gold per tonne of rock — so enormous quantities of ore must be processed for a modest amount of metal. A third, informal channel, artisanal and small-scale mining (ASM), supplies meaningful volumes in many developing economies.
From ore to doré
At the mine, ore is crushed and the gold extracted — commonly by gravity separation and chemical leaching. The recovered gold is melted into a rough alloy called a doré bar, typically around 80–90% gold mixed with silver and other metals. Doré is not yet investment-grade; it is the semi-finished product shipped to a refinery.
Refining to 99.99%
Refineries purify doré to bullion standard using two classic processes: the Miller process (bubbling chlorine gas through molten gold to reach about 99.5% purity) and the Wohlwill process (electrolysis, which achieves 99.99%). The most trusted refiners meet the LBMA’s “Good Delivery” standard — the benchmark that lets a bar trade anywhere in the world without re-assay. Only after this does gold become the 24K bullion investors buy.
Why this matters for the price
Because mining is slow, capital-intensive, and geologically constrained, the total above-ground stock of gold grows only about 1–2% a year, almost regardless of the price. That inelastic supply is central to gold’s identity as a store of value: unlike paper money, no one can rapidly increase the amount of it. Recycling responds somewhat to higher prices, but new mine supply cannot ramp up quickly. To see how supply and demand meet in the live market, read what drives gold prices and check the current gold price. This article is educational and not financial advice.