Mohawkite

Mohawkite is a rare rock consisting of mixtures of arsenic, silver, nickel, skutterudite and copper, with the formula Cu₃As up to Cu₆As, and the most desirable material was usually found in a white quartz matrix.^[1] It has a hardness of 3–3.5 and a metallic luster.^[2] It is named after the Mohawk Mine, where it was originally found. 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.^[1]

^ ^a ^b Lynch, Dan R., and Bob Lynch. "Mohawkite." Michigan Rocks & Minerals. Ed. Brett Ortler. N.p.: Adventure Publications, n.d. N. pag. Print. ISBN 978-1591932390
^ "Mohawkite". Gemdat. Retrieved January 22, 2014.

[lynch-1] Lynch, Dan R., and Bob Lynch. "Mohawkite." Michigan Rocks & Minerals. Ed. Brett Ortler. N.p.: Adventure Publications, n.d. N. pag. Print. ISBN 978-1591932390

[2] "Mohawkite". Gemdat. Retrieved January 22, 2014.

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