Taxing of precious metals means that when you buy something made of a precious metal like gold, silver, or platinum you usually have to pay a 'tax' on the item. This is a way for the government to get money and it helps pay for public services like roads, schools, and police departments. When people buy and sell things made of precious metals, the government charges a certain amount of money called the 'tax' which gets used to help pay for services everyone uses.