Marathon Fusion claims it turned mercury into gold using fusion neutrons
Startup Marathon Fusion says it made gold from mercury and set an isotope enrichment record. It did not disclose how much gold was produced.
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what happened
According to TradingView, San Francisco-based startup Marathon Fusion claims it converted mercury into stable gold using neutrons produced by a fusion reaction. In a post on X dated October 21, the company also reported a record isotope enrichment in a plasma centrifuge and said it is building a fusion reactor.
The company says its gold-production rate was ten times the record CERN set in 2025. However, it has not disclosed how much gold was made and has not published detailed experimental data. A 2025 research paper outlined the method: neutrons convert mercury-198 into mercury-197, which then decays into gold-197.
The startup also ties its work to shortages of medical radioisotopes used in targeted cancer therapies. It said it plans to double its reactor's power density every month.
why it matters
For gold markets the news is mostly symbolic for now: the claim is not backed by published data, and the company has given no commercial production timeline. No effect on gold supply is visible yet.
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sources
- Marathon Fusion claims to make gold from mercury, produce cancer-treatment isotopes — TradingView, 23 October 2026 at 08:08 UTC
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