Latest update here is the X-Ray Fluorescence Spectroscopy carried out by The Goldsmiths Company assay office Button----- Silver 928.0 ppt, copper 67.9 ppt, lead 4.1 ppt Loop------- Silver 925.6 ppt, Gold 3.2 ppt, copper 67.7 ppt, lead 3.5 ppt Solder----- Silver 695.7 ppt, copper 229.6 ppt, lead 3.4 ...