Description

Mohawkite is a rare rock consisting of mixtures of arsenic and copper, usually in a white quartz matrix. Colors range from brassy-yellow to metallic gray, and sometimes will have a blue or greenish surface tarnish. These colors come from its two main ingredients, the arsenic-rich copper minerals algodonite and domeykite. Its color may resemble pyrrhotite, but unlike pyrrhotite, mohawkite is not magnetic. Mohawkite is believed to only be found in a copper mine located on the Keweenaw Peninsula of Michigan, known as the Mohawk Mine.