Definition

Noun: A colorful mineral, primarily consisting of copper and iron sulfides, known for its iridescent tarnish that displays a spectrum of colors resembling a peacock's tail. It is a common sight in copper ore deposits.

Usage

This term is used specifically in geology, mineralogy, and mining contexts to describe the distinctive, naturally tarnished form of the mineral bornite or sometimes chalcopyrite.

Examples

• Geologists identified a rich vein of peacock ore in the old mine.
• The specimen of peacock ore in the museum case shimmered with blues, purples, and golds.
• Miners sometimes call it peacock ore because of its brilliant colors.

Advanced Usage

• The term is often used interchangeably with "bornite" in informal or descriptive contexts, though technically, "peacock ore" refers to the tarnished surface appearance of the mineral.
• It can be used metaphorically to describe something with a similarly dazzling, multi-colored, or showy appearance.
  • The oil slick on the water had a peacock ore sheen.

Variants and Related Words

• Bornite (n): The specific mineral name for Cu₅FeS₄, which tarnishes to become peacock ore.
• Chalcopyrite (n): Another copper-iron sulfide mineral (CuFeS₂) that can exhibit similar iridescent tarnishing.
• Iridescent (adj): Showing luminous colors that seem to change when seen from different angles.

Synonyms

• Variegated copper ore (descriptive synonym)
• Purple copper ore (an older, less common name)

Notes on Meaning

The meaning of "peacock ore" is highly specific. It does not refer to all copper ores, but specifically to those with this characteristic iridescent surface coloration caused by oxidation. Its primary meaning is mineralogical.

Noun

1. a mineral consisting of sulfides of copper and iron that is found in copper deposits