azurite

Thân thiện

A geologist holds a piece of azurite in a rock collection.

Definition

Noun: 1. A blue mineral: Azurite is a soft, deep blue copper mineral produced by weathering of copper ore deposits. It is a basic carbonate with the chemical formula Cu₃(CO₃)₂(OH)₂. 2. A pigment: Historically, the crushed mineral was used as a blue pigment in painting.

Usage and Examples

• As a mineral:
  • The geologist identified the brilliant blue crystals in the rock as azurite.
  • Azurite is often found in association with the green mineral malachite.
• As a historical material:
  • Medieval artists sometimes used azurite to create vibrant blue skies in their paintings.

Advanced Usage

• In geology/mineralogy: The term is used precisely to describe a specific copper carbonate hydroxide mineral. It is valued by collectors for its distinctive color and crystal forms.
• In art history: References to "azurite" in historical texts often pertain to the use of the mineral pigment, which was sometimes called "mountain blue" or "Armenian stone."

Variants and Related Words

• Malachite (noun): A green basic copper carbonate, Cu₂CO₃(OH)₂, often found with azurite and forming from it through chemical alteration.
• Azurite-malachite (noun): A term for a rock that contains both minerals in a mixed, often banded, form.

Synonyms

• Blue copper carbonate (scientific synonym)
• Chessylite (an archaic synonym named after the Chessy-les-Mines deposit in France)

Notes on Different Meanings

The word "azurite" has a highly specific meaning and is not commonly used in figurative or idiomatic language. Its usage is almost exclusively confined to scientific (geology, chemistry), artistic, and collecting contexts.

Học thuật

Noun

1. blue carbonate of copper; blue malachite