azurite
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.
Noun
-
blue carbonate of copper; blue malachite
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