Nickel is very similar to cobalt, though there is no known role in humans. Recently, the biological role in some microorganisms and plants has been established. If those microorganisms are in the human body and there is an excess of nickel in the body, then there can be some toxic responses to these organisms. Navy beans can contain this element. Interestingly, it is believed that a substantial amount of nickel arrived on our planet via meteorites. Early cultures used nickel with iron to make a non-rusting steel and also added it to glass to create green glass. Also, the Peruvians identified it as a type of silver.

Nickel Scale

Nickel Sound Sketch