Michigan's Precious Metal and Gem Dealer Act (MCL 445.481 to 445.492) covers any business that regularly buys "precious items": jewelry, precious gems and anything containing gold, silver or platinum. Coins, medals and tokens struck by a government or private mint, and bullion bars and discs of the kind banks and commodity exchanges trade, are excluded, which is why a coin sale at a Michigan shop involves none of this. Each dealer registers with the local police and supplies thumbprints of the applicant and every employee, and running a shop without that registration is a felony.
At the counter you must show a valid driver's license or Michigan ID card; no dealer may buy from anyone under 18. The dealer fills out a numbered record of transaction with your name, date of birth, ID number, street address, signature and a thumbprint, plus every letter and mark inscribed on the jewelry and how you were paid. Cash, check, money order and bank draft are all allowed. A copy goes to the local police within 48 hours, and to the police where you live if that is somewhere else. The dealer keeps its copy at least 1 year and must destroy it after a year if no police investigation has come up.
The dealer then holds each item for 9 calendar days, unaltered except as needed to appraise it, before it can be melted or resold. Shops whose principal business is general second hand goods need a license under a separate 1917 act, which sets a 15-day hold in the building where the article was bought (MCL 445.405).