Could Lab-Made Gold Eventually Disrupt the Bullion Market?

Startup Marathon Fusion says it has converted mercury into stable gold at roughly 10 times CERN’s previous record rate.
If independently verified, the experiment could represent an important step toward producing real gold through nuclear transmutation rather than mining.
The long-term implications could be significant.
Marathon estimates that a future 1 GW fusion plant could theoretically produce around 5 tonnes of gold annually.
At that scale, 100 fusion plants could generate roughly 500 tonnes per year, equivalent to about 14% of global gold mine production in 2025.
Unlike lab-grown diamonds, this would not simply be a substitute material.
Once radioactive isotopes have decayed and the material is safe, the resulting gold would be physically indistinguishable from naturally mined gold.
That raises an unusual long-term question for the bullion market: could technological progress eventually create a new source of gold supply large enough to affect scarcity?
For now, there are major reasons for caution.
Marathon’s latest claim has not been independently verified, and the company has not disclosed how much gold was actually produced or what the process cost.
Commercial fusion itself also remains far from deployment at the scale required for hundreds of gigawatt-class plants.
So there is no immediate threat to global gold supply.
But if the process is verified, fusion becomes commercially viable and production economics work at scale, mercury could eventually become one of the most unexpected new sources of gold in history.