How to check purity of silver coins bought on Dhanteras at home?

A simple method to check purity of a silver coin bought on Dhanteras is to use a magnet as pure silver is non-magnetic, Livemint reported. If it sticks to the magnet, it indicates presence of iron or nickel alloys. Silver produces a clear, ringing sound when tapped with another metal, while coins made from metal alloys make shorter, duller sounds.