A team from the University of Sydney has come up with a method that uses nanoscale, synthetic diamonds to detect cancers before they become life threatening. The physicists findings, published in the journal Nature Communications, reveal how to make the tiny gems light up inside a Magnetic Resonance Imaging (MRI) machine, acting as a beacon for early-stage cancers. The manipulated diamonds are then attached to specific chemicals that are known to target cancers. The microscopic diamonds are injected into the body and tracked as they move through the patient's system. If there is any trace of cancer in the individual’s body, the chemicals will be attracted to the site and the attached diamonds will provide a "lighthouse" on the MRI scan.