11-07-2019, 11:58 AM
(This post was last modified: 11-07-2019, 11:58 AM by Biddlecombe.)
You could try Fake or Fortune techniques, there is Infrared Radiation, Microscopy, Multispectral Scanning, Raman Laser Spectoscropy, X Radiation, and even X-Ray Flouresence! I should ring Fiona Bruce.