Koridnium Ore is Legendary
Despite often being confused for gold when first spotted, Koridnium, one of the most valuable metals in existence, is denser than gold yet has only a quarter of its weight.
For this very reason, Koridnium costs a fortune and is only attainable by those of very affluent means, such as royalty and nobility.
King Tra of Mulfiddich had his throne replaced by one made entirely out of Koridnium.
This was not a popular move with the subjects of his kingdom who were already disgruntled with the high taxes at the time.