Palladium is a silvery-white metal that's part of the platinum group of metals, which also includes rhodium and iridium. Pure palladium is often alloyed with other metals (such as gold) to make white gold, which is stronger than sterling silver and darker in colour. Palladium is lighter than platinum in colour, melts at a lower temperature (which makes it easier to work with), and is a fraction of the price. Like most metals, palladium needs to be polished to preserve its lustre.
Put approximately 1 tsp of liquid soap in a small bowl. Add warm water to dissolve the soap.
Place your palladium jewellery into the bowl. Let it sit for 20 to 30 minutes.
Remove the jewellery from the bowl. Using the nailbrush, gently scrub the surface of the jewellery to remove tarnish that may have settled into any grooves around stone settings.
Return the jewellery to the bowl and continue to let it soak for five to 10 minutes. Remove. Rinse it thoroughly in warm water. Dry and polish it with a lint-free cloth until your palladium jewellery shines.
Replace the soap with baking soda and add a 1-inch-square sheet of aluminium foil to the water. Heat the solution until boiling and add the metal jewellery. The natural reaction of the aluminium and baking soda will help clean tarnish off most metals.