Highly resistant to corrosion, resistant to wear and tarnish, extremely rare and more valuable than gold. It can only be platinum.
Most people will know that platinum is used to make fine jewelry but did you know it's also used in cars as a catalytic converter? It's also used in the standard meter bar - literally a bar of 90% platinum and 10% iridium which serves to define the exact length of a metre. Platinum was used because it doesn't oxidise and it expands and contracts very little in respo