The new elementals (first elemental statted out, everyone can add)

[Yuki Akuma]

Gold is extremely nonreactive. It's almost always found in elemental form. This is why you get gold nuggets washing up in rivers.

This is also why gold is so valuable; not only is it rare, it doesn't rust.

Silver tarnishes after a while. So does copper, and brass, and tin, and iron, and steel... the most valuable metals don't corrode, for some reason.

(Fun fact: Gold is sometimes used instead of copper or silicon in electronics because it's very good at conducting electricity, with the added bonus that it doesn't rust after a while.)