noun
- a blue copper sulfide mineral that occurs as a coating on other copper minerals
Usage: mineralogy
Examples
- The geologist identified covelline by its distinctive blue color.
- Covelline often forms as a secondary mineral in copper deposits.
- The specimen showed a thin layer of covelline over chalcopyrite.
- Mining operations sometimes encounter covelline in oxidized copper ores.
- The blue iridescent coating was determined to be covelline.
- Covelline typically forms through the alteration of primary copper sulfides.