Silver problems guide for diagnosing firestain, porosity, contaminated stock, mixed alloys, plated surfaces, and misleading marks before repair or remelting.
Canadian silver hallmarking rules stem from the Precious Metals Marking Act, not UK or US assay law. Here is what makers may stamp and the risk of errors.
How to read a US silver maker's mark with no assay office: use state historical societies, trade catalogs and maker registers, plus what federal law allows.
How to tell sterling silver from silver plate: what marks to read, what a magnet and a scratch test show, and where each method fails at a US thrift store.