PhotonAssay™ is a non-destructive analytical technique that uses high-energy X-rays to measure the amount of gold, silver, copper and other elements in geological samples. Originally developed through CSIRO research and commercialised by Chrysos Corporation, PhotonAssay™ is deployed at mine sites and commercial laboratories around the world.

Unlike traditional fire assay, which requires crushing, splitting, fluxing, and smelting a 50-gram sub-sample over many hours, PhotonAssay™ analyses the entire 500-gram sample in two minutes. The sample remains intact and can be remeasured or stored for future reference.

The technology eliminates lead-based fluxes and high-temperature furnaces, removing key occupational health hazards and producing zero scope 1 emissions. The result is data that Competent and Qualified Persons trust, regulators accept under JORC and NI 43-101 reporting codes, and that miners around the world are basing decisions on every day.