Earth's core is made up of mostly what? a.) silicate materials b.) magnesium and iron c.) iron and nickel d.) light elements like hydrogen

Ibelieve it's the pacific islands 

If a particular resource is not useful or needed then the price would be considerably low. once that resource is needed the price or value will raise depending on how useful or needed it is especially if the resource is low in quantity, the consumers would pay whatever they have to, to get that material.