Short answer: Most of the world’s silver is not mined for its own sake. It is recovered as a by-product of mines producing lead and zinc, copper or gold, so silver supply does not rise and fall with the silver price alone. Mexico is the largest producer, followed by China and Peru. Demand comes both from industry, especially electronics and solar panels, and from jewellery, silverware and investment.
Silver is both a precious metal and an industrial material. Its unmatched electrical conductivity, its reflectivity and its antimicrobial properties create uses far beyond coins and jewellery. And its geology makes its supply unusually dependent on other metals.
Where silver is mined
Mexico is the world’s largest silver producer, with a mining history that goes back to the Spanish colonial era, when silver from Zacatecas and Guanajuato flowed around the world. China and Peru follow, with significant production also in Chile, Poland, Bolivia, Russia, Australia and the United States.
Within those countries, silver comes from a wide range of deposit types, from rich veins mined underground to large open pits producing copper, zinc or gold with silver as a valuable extra.
Primary and by-product silver
A primary silver mine earns most of its revenue from silver. Such mines exist, especially in Mexico and Peru, but they produce only a minority of the world’s supply.
Most silver comes from polymetallic mines, where it occurs alongside lead and zinc, from copper mines, or from gold mines. At these operations, silver is recovered because the ore is already being mined and processed for the main metal.
That distinction matters for the market. A high silver price can improve a by-product mine’s margins without causing it to produce more, if its plan is driven by zinc or copper. And a mine built for copper can add silver supply even when silver prices are weak. As with cobalt, understanding silver supply means understanding other metals first.
How silver is recovered
Processing depends on the minerals in the ore. At lead-zinc and copper mines, flotation separates the valuable minerals into concentrates, and silver usually travels with them, most often in the lead concentrate. Smelters and refineries then recover the silver as a separate product. At gold-silver mines, ore may be leached with cyanide, recovering both metals together before they are separated.
Because silver passes through several stages and often several companies, “mine production” and “refined supply” describe different points in the chain, and statistics need to say which one they measure.
Why reported costs can look low
Silver mining companies often report a cost per ounce after subtracting the revenue from by-products such as gold, lead or zinc. A mine with valuable by-products can therefore report a very low, or even negative, net cost per ounce of silver, even though its total operating costs are substantial.
That is a legitimate accounting convention, but it makes comparisons tricky. Readers should look at the revenue mix and the definition being used before treating a low cost figure as a sign of a low-cost mine.
Industrial demand
Silver conducts electricity and heat better than any other metal and reflects light very well. That makes it essential in electronics, from circuit boards to switches and contacts, and in brazing alloys used to join metals.
Solar power has become one of the largest single uses. Silver paste forms the fine conductive lines on photovoltaic cells that collect the current they generate. As solar installation has grown, so has silver demand, even as manufacturers work to reduce the amount of silver per panel, a process known in the industry as thrifting. Silver is also used in medical devices, water treatment and some chemical processes.
Jewellery, silverware and investment
Alongside industrial demand, silver remains important as jewellery, silverware and investment in coins, bars and funds. This mix makes silver behave partly like an industrial commodity and partly like a financial asset, and its price can respond to factory output and to investor sentiment at the same time.
Recycling responds differently
Silver recycling depends on how the metal was used. Jewellery, silverware and industrial scrap with high silver content return readily to the market when prices rise. Silver spread in tiny amounts through electronics, solar panels and other complex products is much harder and more expensive to recover. The practical recycling rate therefore varies widely by use, and growth in uses like solar may make future recovery more important.
At a glance
| Item | Detail |
|---|---|
| Main production model | By-product and co-product of other metals |
| Main host metals | Lead, zinc, copper and gold |
| Largest producer | Mexico |
| Other major producers | China, Peru |
| Major uses | Electronics, solar panels, brazing, jewellery, investment |
| Cost reporting issue | By-product credits can make costs look very low |
Frequently asked questions
Are most silver mines primary silver mines?
No. Most mined silver comes from operations whose main products are lead, zinc, copper or gold.
Which country produces the most silver?
Mexico, followed by China and Peru.
Why is silver used in solar panels?
Its excellent conductivity makes it effective in the thin conductive lines that collect electricity from solar cells.
Why doesn’t silver supply rise when prices rise?
Because much of it is a by-product. Mines decide how much to produce based mainly on their primary metal.
Sources and further reading
Photo: Mhwater at Dutch Wikipedia, public domain, via Wikimedia Commons.
