The other thread has me wondering how a person should go about determining the value of gold, silver, jewelry, etc. should we get to a barter system in the future. I don't know how to tell if something is pure gold or silver what percentage of gold is in a gold ring, etc. How do you tell if a coin is really gold or silver? How much silver is actually in a "junk silver" coin? Does anyone here have a system they could share? I'm envisioning a post-SHTF scenario in which people are trading gold or silver jewelry, junk silver, etc. for merchandise. How would you keep from getting scammed?