When you buy a gold bar, you’re not just buying metal. You’re buying a story. The problem is, for most of the industry’s history, that story has been impossible to verify.
Marcus Briggs has spent nearly two decades trading gold across the Middle East and Africa. The opacity in the supply chain creates problems that range from inconvenient to catastrophic. Counterfeit bars. Conflict minerals funding armed groups. Artisanal miners exploited by middlemen. Refineries with questionable environmental and labour practices. All of this thrives in the shadows of an industry that has historically operated on trust and relationships rather than verifiable data.
Blockchain technology is changing that equation. Not overnight, and not without resistance, but the transformation is underway. For an industry built on the immutability of gold itself, the irony of using immutable digital ledgers to track it is hard to miss.
The Opacity Problem
The gold supply chain is astonishingly complex. A single bar sitting in a vault in London might contain gold extracted from a dozen different mines across three continents, processed through multiple refineries, and traded through layers of intermediaries before reaching its final destination.
At each stage, documentation changes hands. Paper certificates. Assay reports. Chain of custody records. All of it vulnerable to human error, deliberate falsification, or simple loss over time.
The result is a system where provenance becomes murky once gold enters the stream. You might know which refinery produced a bar, but tracing that gold back to its mine of origin? Nearly impossible in most cases. This opacity creates real consequences.
Counterfeit gold bars, often tungsten cores plated with real gold, periodically surface in legitimate markets. The financial losses can be substantial, but the reputational damage to the industry is worse. When trust erodes in a market built on trust, everyone pays the price.
Then there’s the conflict mineral problem. Gold extracted from areas controlled by armed groups, often using forced labour or funding violence, can find its way into legitimate supply chains. The Democratic Republic of Congo, parts of South America, and other conflict zones produce significant quantities of gold that ultimately end up refined and sold through mainstream channels.
Without robust tracking, it becomes nearly impossible to guarantee that the gold you’re buying didn’t fund human rights abuses somewhere upstream.
How Blockchain Creates Transparency
Blockchain technology offers a solution to these problems through its core characteristics: immutability, transparency, and decentralization.
At its simplest, blockchain creates a permanent, tamper-proof record of transactions and data. Once information is written to the blockchain, it cannot be altered or deleted. For gold supply chains, this means creating a digital record that follows the metal from mine to market.
Here’s how it works in practice:
When gold is extracted from a mine, data about that specific batch gets recorded on the blockchain. GPS coordinates of the mine. Date of extraction. Estimated purity. Initial weight. That data becomes the first entry in that gold’s permanent record.
As the gold moves through the supply chain, each subsequent handler adds their data to the chain. The transport company logs the shipment. The refinery records processing details, assay results, and bar numbers. Dealers document trades. Every step creates a new block in the chain, building an unbroken record of custody and transformation.
The beauty of this system is that it’s verifiable by anyone with access to the blockchain. A buyer in Switzerland can scan a QR code on a gold bar and trace its entire journey back to the mine where it originated. No relying on paper certificates that could be forged. No trusting verbal assurances from traders. The data is there, permanent and transparent.
Several initiatives are already implementing this vision. The London Bullion Market Association’s Gold Bar Integrity program, which I discussed in a previous article, uses distributed ledger technology to create tamper-proof records of gold bars as they move through the system. Over 85% of the world’s gold refineries have now adopted this standard.
Other projects go further upstream. Companies like Emergent Technology are working with mining operations to track gold from the point of extraction, creating what amounts to a “digital passport” for gold that follows it through its entire lifecycle.
Combating Counterfeit Bars and Fraud
Counterfeit gold is a persistent problem in the industry. The most sophisticated fakes use tungsten, which has nearly the same density as gold, making them difficult to detect through simple weight and volume measurements.
I’ve encountered these fakes over the years, as have many others in the trade. Sometimes they’re caught during routine verification. Sometimes they’re not discovered until much later, creating liability questions about who bears the loss.
Blockchain doesn’t prevent the physical creation of fake bars, but it makes passing them off as legitimate much harder. Every genuine bar recorded on the blockchain has a unique identifier and a complete history. A fake bar either has no blockchain record at all, which immediately flags it as suspicious, or it must steal the identity of a real bar, which creates a conflict when the genuine bar appears.
Some systems combine blockchain records with physical authentication methods. Refineries embed unique markers in the gold itself, microscopic signatures that can be detected with specialized equipment. The blockchain then records these physical markers, creating a link between the digital record and the physical metal that’s nearly impossible to fake.
This layered approach, physical authentication paired with blockchain verification, creates a robust defense against fraud.
Ensuring Ethical Sourcing and Conflict-Free Gold
The ethical sourcing question is where blockchain’s impact could be most significant, and where the industry faces its greatest challenges.
Conflict gold, sometimes called “blood gold,” funds armed groups and often involves human rights abuses ranging from forced labour to environmental destruction. International regulations like the OECD’s Due Diligence Guidance and the US’s Dodd-Frank Act require companies to verify their gold doesn’t come from conflict zones, but enforcement has been difficult.
The problem is that gold is fungible. Once refined, gold from a conflict zone is physically indistinguishable from gold mined responsibly. Without robust tracking from the source, unethical gold can easily be laundered through the supply chain.
Blockchain creates accountability by making the source visible. A mining operation in a conflict zone can’t simply sell to a refinery and have that gold disappear into the anonymous stream. The blockchain record shows exactly where the gold originated.
For artisanal and small-scale miners, who produce an estimated 20% of the world’s gold supply, blockchain can also create opportunity. These miners are often exploited by middlemen who offer below-market prices because the miners have no direct access to legitimate buyers. With blockchain verification of origin and ethical practices, artisanal miners can potentially bypass intermediaries and sell directly into formal markets.
Projects like the CRAFT Code (Code of Risk-mitigation for Artisanal and small-scale mining engaging in Formal Trade) are working to bring small-scale miners into blockchain-tracked supply chains. Miners who meet environmental and labour standards can have their gold certified and tracked, potentially commanding premium prices from buyers seeking ethically sourced metal.
Environmental Impact and Sustainability
Gold mining carries significant environmental costs. Deforestation, mercury contamination from artisanal operations, and massive energy consumption in industrial mining all contribute to the industry’s environmental footprint.
Blockchain can’t eliminate these impacts, but it can make them visible and quantifiable. When environmental data gets recorded on the blockchain alongside provenance information, buyers can make informed decisions about the gold they purchase.
Some refineries are already tracking carbon emissions associated with the gold they process, recording this data on blockchain platforms. This creates the possibility of a tiered market where environmentally responsible gold commands a premium.
Insurance companies and financial institutions are also showing interest. Gold that comes with verified environmental and ethical credentials presents lower regulatory and reputational risk. In a world of increasing ESG scrutiny, blockchain-tracked gold could become the industry standard simply because untracked gold becomes too risky to handle.
Implementation Challenges
Despite its promise, blockchain implementation in the gold supply chain faces real obstacles.
The first is technological infrastructure. Many gold-producing regions, particularly those with significant artisanal mining, lack reliable internet connectivity and the technical literacy needed to interact with blockchain systems. Creating user-friendly interfaces that work in low-connectivity environments is an ongoing challenge.
The second is cost. Implementing blockchain tracking requires investment in technology, training, and administrative overhead. For large refineries and established dealers, these costs are manageable. For small-scale miners and regional traders, they can be prohibitive.
There’s also the coordination problem. Blockchain’s value comes from creating a complete chain of custody, but that only works if every participant in the supply chain adopts the system. A single gap in the chain, whether from a refinery that hasn’t implemented blockchain or a trader who refuses to use it, can break the verification trail.
Industry adoption has been steady but not universal. The LBMA’s Gold Bar Integrity initiative has achieved impressive uptake among refineries, but gaps remain particularly in the artisanal and small-scale mining sector where arguably the need is greatest.
Finally, there’s the question of privacy. While transparency is the goal, some market participants have legitimate concerns about exposing proprietary information. A mining company might not want competitors knowing exactly how much gold it’s extracting or where new deposits have been found. Balancing transparency with commercial confidentiality requires carefully designed systems that reveal what needs to be public while protecting what should remain private.
What Comes Next
Blockchain technology is not a silver bullet for every problem in the gold supply chain, but it’s proving to be a powerful tool for creating accountability where previously there was none.
The technology is mature enough now that questions about whether blockchain can work in this context have been answered. It can. The questions now are about implementation, standardization, and adoption.
For those of us in the industry, Marcus Briggs included, the message is clear: transparency is no longer optional. Buyers, whether institutional investors, central banks, or individual consumers, are demanding to know where their gold comes from and how it was produced. Blockchain provides a mechanism to answer those questions credibly.
The gold that will command the highest prices and the greatest trust in the years ahead won’t just be pure gold. It will be gold with a clean, verifiable history. Digital passports for physical metal.
That transformation is already underway. The question for everyone in the supply chain is whether to lead it, follow it, or be left behind by it.
