How do you check platinum?

Answer 1

Measuring the density or hardness; the most sure method is a chemical analysis made with a type of spectrometer (emission, ICP, MS, etc.).

Answer 2

To check if a metal item is made of platinum, you can start by looking for hallmarks or stamps on the item. Platinum jewelry is often marked with a "Pt" or "Plat" stamp. You can also conduct a magnet test, as platinum is not magnetic. Additionally, you can take the item to a professional jeweler or use a testing solution specifically designed to determine the metal content.