RockVault
Azurite

Image: Photo by and (c)2015 Derek Ramsey (<a href="https://en.wikipedia.org/wiki/User:Ram-Man" class="extiw" title="en:User:Ram-Man">Ram-Man</a>) (CC BY-SA 4.0)

monoclinicuncommoncarbonates

Azurite

Cu₃(CO₃)₂(OH)₂

This specimen features a vibrant cluster of deep azure-blue azurite crystals, exhibiting a vitreous luster and forming an attractive aggregate.

Azurite Physical Properties

Mohs Hardness

3.5

Crystal System

monoclinic

Luster

vitreous

Streak Color

light blue

Cleavage

good on {011}, poor on {100}

Fracture

conchoidal

Specific Gravity

3.8

Colors

azure blue, deep blue, light blue

Transparency

translucent

Type Locality

Guangdong Province, China

Mineral Group

carbonates

Uses

copper ore, pigment, collector's specimens, minor gemstone

Associated Minerals

malachite, cuprite, chrysocolla, native copper, limonite

Rarity

uncommon

Geological Context

Azurite is a secondary mineral formed in the oxidized zone of copper ore deposits, typically in arid or semi-arid environments, resulting from the alteration of primary copper minerals by carbonated waters.