Security Matters is an Israeli company that has developed a system that permanently "marks" any object in solid, liquid or gas form, verifying its origins and making it possible to track it through the supply chain. The CEO looks dedicated but their current website is really terrible sending mixed messages making me feel confused and nervous.
They have however signed an agreement with The Perth Mint, and I'm sure THEY wouldn't be getting into bed with some backyard cricket team.
https://www.australianmining.com.au/news/perth-mint-signs-agreement-with-security-matters-to-protect-its-gold/