What does Covellite mean?

Covellite meaning in General Dictionary

A native sulphide of copper, occuring in public of a dark blue color; -- therefore known as indigo copper.

Sentence Examples with the word Covellite

The mineral is especially liable to surface alteration, tarnishing with beautiful iridescent colours; a blue colour usually predominates, owing probably to the alteration of the chalcopyrite to covellite (CuS).

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