Precious Metals Refining in Switzerland: Industry Structure and Global Significance
Switzerland refines approximately two-thirds of the world’s gold and a substantial share of other precious metals, making it the undisputed global centre for precious metals processing. This concentration — remarkable for a country with no significant mining output — reflects a century of institutional development, technical expertise, and strategic positioning at the intersection of global supply and demand.
Industry Overview
The Swiss precious metals refining industry is dominated by four major refineries, all located within a compact geographic area in the cantons of Ticino, Neuchâtel, and Vaud:
| Refinery | Location | Founded | Specialisation |
|---|---|---|---|
| Valcambi | Balerna (Ticino) | 1961 | Gold, silver, platinum, palladium |
| PAMP | Castel San Pietro (Ticino) | 1977 | Gold, silver, platinum, palladium |
| Argor-Heraeus | Mendrisio (Ticino) | 1951 | Gold, silver, platinum, palladium |
| Metalor Technologies | Marin-Epagnier (Neuchâtel) | 1852 | Gold, silver, PGMs |
These four facilities collectively process an estimated 2,000 to 2,500 tonnes of gold annually — roughly 65 to 70 per cent of the world’s newly mined and recycled gold. Their combined silver, platinum, and palladium refining capacities are similarly dominant.
Gold Refining: The Core Business
Swiss gold refining is the backbone of the precious metals refining sector. The process involves transforming doré bars (semi-pure gold from mines), scrap gold, and recycled materials into London Good Delivery bars (400 oz, minimum 995.0 fineness) or smaller bars and products for investment and jewellery markets.
Refining Processes
Swiss refineries employ two principal refining methods:
Miller Process (Chlorination): Uses chlorine gas to remove base metals and silver from molten gold, producing gold of 995 to 996 fineness. This is the faster process, suitable for large-scale operations.
Wohlwill Process (Electrolytic): Uses electrolysis to produce gold of 999.9 fineness (four-nines fine). This process is slower and more expensive but produces the highest purity gold, required for certain investment products and electronics applications.
Most Swiss refineries operate both processes, using the Miller Process for initial purification and the Wohlwill Process for final refinement when ultra-high purity is required.
Product Range
Swiss refineries produce a diverse range of gold products:
- London Good Delivery bars: 400 oz (~12.4 kg), the standard for central bank reserves and institutional trading
- Kilobars: 1 kg bars, the standard in Asian physical markets
- Small bars: 1 g to 100 g, for retail investment
- Grain and shot: For jewellery manufacturing
- Speciality products: Blanks for minting, industrial powders, electroplating solutions
Silver Refining
Silver refining in Switzerland is closely integrated with gold operations. Silver is recovered both as a by-product of gold refining (particularly from doré bars with significant silver content) and from dedicated silver feedstocks.
Key characteristics of Swiss silver refining:
- Annual capacity estimated at 3,000 to 4,000 tonnes across major refineries
- Products include London Good Delivery bars (approximately 1,000 oz), industrial bars, and granules
- Growing demand from industrial applications (solar panels, electronics) supplements traditional investment demand
- Silver recycling from photographic and electronic waste is an increasingly important feedstock
Platinum Group Metals
Switzerland’s four major refineries also process platinum group metals (PGMs) — platinum, palladium, and rhodium. These metals present unique refining challenges due to their chemical properties and the complexity of separating individual PGMs from mixed concentrates.
| Metal | Primary Source | Key Application | Swiss Refining Role |
|---|---|---|---|
| Platinum | South Africa, Russia | Automotive catalysts, jewellery | Significant refining capacity |
| Palladium | Russia, South Africa | Automotive catalysts, electronics | Growing capacity |
| Rhodium | South Africa | Automotive catalysts | Specialised refining |
The PGM refining segment has grown in importance as automotive catalyst recycling has expanded. Swiss refineries receive spent catalytic converters from collectors worldwide, extracting and refining the PGMs for return to the market.
Supply Chain and Sourcing
Swiss refineries source their feedstock from multiple channels:
Mine Production
Doré bars from mines worldwide are shipped to Swiss refineries for refining. Major mining companies maintain long-term relationships with Swiss refiners, often through offtake agreements that guarantee minimum volumes.
Key sourcing regions include:
- West Africa: Gold from Mali, Burkina Faso, Ghana, Guinea
- South America: Gold from Peru, Brazil, Colombia
- Central Asia: Gold from Uzbekistan, Kazakhstan
- Australia and North America: Doré from large-scale mining operations
Recycled Material
Recycled gold represents an increasingly significant feedstock, estimated at 25 to 30 per cent of Swiss refining inputs. Sources include:
- Old jewellery and coins
- Electronic waste (circuit boards, connectors)
- Industrial scrap (dental gold, laboratory equipment)
- Central bank bars being re-refined to current standards
Artisanal and Small-Scale Mining (ASM)
ASM-sourced gold represents a sensitive area for Swiss refiners. While artisanal mining supports millions of livelihoods in developing countries, it is also associated with environmental damage, hazardous working conditions, and, in some cases, armed conflict. Swiss refiners have implemented due diligence programmes to manage these risks, though the effectiveness of these measures remains debated.
Regulatory Framework
The precious metals refining sector operates within a multi-layered regulatory framework:
Swiss Domestic Regulation
Switzerland’s commodity regulation framework applies to precious metals refiners, with specific requirements including:
- Precious metals control: The Federal Precious Metals Control Act regulates assaying, hallmarking, and trade in precious metals
- Anti-money laundering: Refiners are subject to AML obligations under the Anti-Money Laundering Act (AMLA)
- Sanctions compliance: Swiss refiners must comply with the Swiss sanctions framework, including restrictions on Russian-origin gold imposed since 2022
International Standards
Swiss refineries adhere to multiple international standards:
- LBMA Good Delivery List: The London Bullion Market Association’s accreditation is essential for selling into institutional markets. All four major Swiss refineries are on the Good Delivery List for gold and silver.
- LPPM Good Delivery List: Similarly, accreditation for platinum and palladium.
- LBMA Responsible Gold Guidance: Requires comprehensive due diligence on gold supply chains, aligned with OECD guidance on responsible supply chains.
- RJC (Responsible Jewellery Council): Certification covering ethical, human rights, social, and environmental practices.
Due Diligence Requirements
The most consequential regulatory development in recent years has been the tightening of supply chain due diligence requirements. Swiss refiners must:
- Identify and assess risks in their supply chains (conflict, human rights, money laundering)
- Implement risk mitigation measures
- Commission independent third-party audits
- Report publicly on due diligence efforts
These requirements align with the OECD Due Diligence Guidance for Responsible Supply Chains of Minerals from Conflict-Affected and High-Risk Areas, adapted for the gold sector.
Competitive Advantages of Swiss Refining
Switzerland’s dominance in precious metals refining rests on several reinforcing advantages:
Reputation and Trust: Swiss hallmarks and refinery brands carry premium recognition in global markets. A “Swiss refined” bar commands trust from central banks, institutional investors, and jewellery manufacturers.
Technical Excellence: Decades of investment in refining technology have produced facilities capable of the highest purity standards and most efficient processing.
Logistics Hub: Switzerland’s central European location, excellent transport infrastructure, and proximity to major airports facilitate the secure movement of precious metals.
Financial Ecosystem: Swiss banks provide structured commodity finance for precious metals trading, including metal accounts, leasing, and hedging facilities.
Neutral Jurisdiction: Switzerland’s political neutrality has historically facilitated precious metals flows from diverse geographies, though this advantage has been somewhat tempered by increasing alignment with Western sanctions regimes.
Freeport and Bonded Facilities: Switzerland operates bonded warehouse facilities that allow precious metals to be stored, traded, and refined without incurring import duties — a critical logistical advantage.
Industry Challenges
The Swiss precious metals refining industry faces several challenges:
Reputational Risk
Media investigations and NGO campaigns have highlighted instances where Swiss refineries processed gold from questionable sources — artisanal mines linked to armed conflict, sanctions-evading intermediaries, or environmental destruction. These revelations have prompted regulatory tightening and enhanced due diligence, but reputational risk remains a persistent concern.
Competition
While Switzerland dominates, competing refining centres are emerging:
- UAE (Dubai): Rapidly growing refining capacity, with some LBMA-accredited refineries
- India: Expanding domestic refining to reduce import dependence
- China: Building refining capacity aligned with the Shanghai Gold Exchange
- Turkey: Growing refining operations, partly driven by Russian gold flows post-2022
Regulatory Burden
The cumulative weight of compliance requirements — AML, sanctions, ESG, supply chain due diligence — creates significant operational costs. Smaller refineries may struggle to absorb these costs, potentially accelerating industry consolidation.
Energy Costs
Precious metals refining is energy-intensive. Swiss electricity prices, while benefiting from hydroelectric generation, are subject to European market dynamics. The energy transition creates both challenges (potential cost increases) and opportunities (renewable energy positioning).
Market Outlook
The Swiss precious metals refining sector’s outlook is shaped by several structural trends:
Continued Demand: Central bank gold purchases, investment demand, jewellery consumption, and industrial applications for PGMs suggest sustained feedstock demand.
Recycling Growth: As gold prices remain elevated and circular economy principles gain traction, recycled feedstock will likely increase as a proportion of total throughput.
Technology Evolution: Advances in refining technology, including more energy-efficient processes and improved recovery rates for trace metals, will drive operational improvements.
Regulatory Evolution: The trend toward stricter supply chain requirements will continue, favouring well-resourced refineries with robust compliance infrastructure.
Geopolitical Shifts: Changes in global gold flows — particularly the redirection of Russian gold away from Western markets — are reshaping trade patterns. Swiss refineries must adapt to evolving sourcing landscapes.
Switzerland’s position as the global centre of precious metals refining appears durable, built on decades of accumulated expertise, infrastructure, and institutional trust. The industry’s ability to navigate increasing regulatory complexity while maintaining operational excellence will determine whether this dominance endures through the coming decade.
Donovan Vanderbilt is a contributing editor at ZUG COMMODITIES, covering precious metals markets, Swiss refining operations, and commodity regulation. Based in Zurich, he draws on two decades of experience in commodity market analysis and institutional research.