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Message:: [QUOTE="Colonialjohn, post: 7481198, member: 57741"]I did alot of research on this when I was in C4 collecting U.S. Colonials. Based on my research I could not confirm even with the Higley's at Simsbury that finished copper mined in the U.S. Colonies was "DIRECTLY" used in ANY U.S. colonial copper. Not sure of the date but maybe the 1820's? do we see some evidence of mine to planchet in the U.S.. In Simsbury for example due to lack of refining equipment copper ore in a semi-finished state was exported and then refined and returned from England as finished copper ingots then turned into planchets. It was then that we debated about provenance and XRF analysis. XRF analysis or even trace constituents can SUGGEST origin but what also must be tied in is a lead & the metal element of concern (i.e., in this case Cu) isotopic analysis to a confirmed standard database along with historical tie-ins. IMO we are still 50 years from this answer. You question one day may be answered but unlikely in your lifetime. I also looked into this silver center cent Morris forgery - making a long story short it appears the U.S. Mint did not even keep any good records of say in 1792 on the pathways of copper used. John Lorenzo, NJ.[/QUOTE]