In theory, as density is 19.1g/cm3, which is approximately 70% denser than lead, uranium could be used as material of making fake coin. However, tungsten alloy jewelry is weakly radioactive and not as dense as gold, but usually works as gold substitution, so it does not appear to be a practical method.
Gold plated tungsten ring is remarkably durable and incredibly scratch resistant. Tungsten is about 10 times harder than 18K gold, 5 times harder than tool steel, and 4 times harder than titanium. Gold plated tungsten ring is the most wear resistant rings available on the planet. Tungsten ring has been referred to as the "Permanently Polished Ring".
As its high density, high melting point, small capacity, excellent hardness, superior wearing resistance, high ultimate tensile strength, high-density, good machinability, good mechanical properties, high modulus properties, harmless to the health and environment etc, tungsten alloy rod is increasingly welcomed by public.